He said he doesn't wanna talk he doesn't care anymore but I still want him? I dont feel like letting him go? what should I do?

Well there is no information in your question. It would totally depend on what happened or what you did to him which made your actions as unforgivable in his view.
It would depend on what or if you did something that he sees as unforgivable. For eg, if you played hard to get, if you played any manipulative mind games, jealousy card etc.
If he does not want to talk to you and does not care anymore then it is clear , he is man who will never tolerate certain things and to him those are unforgivable and so you have no chance here. There is nothing you can do except learn from your mistakes.
If you never did what I mentioned above then you need to give some information based on which I can give a better opinion.
(I don't know how to tell but I tried)
I call him multiple times when he was busy. I'm doing this for last 6-7 months. Last week i called him multiple times and he said if i am at work and not receiving your calls meaning i'm busy. the next day i called him due to some reasons and i heard accident sound so i called him multiple times because i was worried. Now he is pissed that i called him multiple times and he started using cuss words and saying that not matter how hard i try to make you things understand you repeat things.
I agree i repeat things i shouldn't call him when he is busy or in meeting. But all i want is to hear his voice for even if its just 2 secnds. Right now i'm dealing with my other life problems and he is all i have and i expect that he would talk to me when i need him. But he talks when i'm done with my problem. No one sees my side.
Everyone says i'm pain in ass.
Now all i really want is to save this but i dont know how. He blocked me from everywhere. I went to his house but he doesn't want to meet.
@Leah_Monet
Given your information. I don't see you did anything wrong. At least not in my view.
I will reply in parts also.
@Leah_Monet
1. "I call him multiple times when he was busy. I'm doing this for last 6-7 months. Last week i called him multiple times and he said if i am at work and not receiving your calls meaning i'm busy. "
Well, it is okay if he was busy but it would be very decent and would make sense had he called you and told you nicely that he is busy and he cannot take your calls now. I mean explaining that nicely would have made you feel better for sure.
@Leah_Monet
2. " the next day i called him due to some reasons and i heard accident sound so i called him multiple times because i was worried. "
I understand it was natural for you to be worried because you care about him and his well being. You had a reason because you heard some accident sound.
@Leah_Monet
3. "Now he is pissed that i called him multiple times and he started using cuss words and saying that not matter how hard i try to make you things understand you repeat things.
I agree i repeat things i shouldn't call him when he is busy or in meeting"
Well, as a guy it does not matter if he was busy or not busy. Okay if he was busy at that moment he did not take your calls, fine but he should have the decency, the grace to call you later when he is relatively free to explain things to you nicely. Him not doing this is totally strange and in many ways unacceptable, I mean this is something I would never do if I was in his place and especially if I know the other person is very kind, caring and of sweet nature.
Hence his behavior is truly unacceptable in my opinion. Him using foul language and shouting!. No, absolutely not acceptable. You were truly concerned about him. Your behavior deserves appreciation.
@Leah_Monet
4. "But all i want is to hear his voice for even if its just 2 secnds."
That is so sweet. I mean this shows you are a truly nice, kind caring and a sweet type of woman. I am sure there are men who appreciate these qualities.
@Leah_Monet
5."Right now i'm dealing with my other life problems and he is all i have and i expect that he would talk to me when i need him. But he talks when i'm done with my problem. No one sees my side."
Well surely you deserve attention. I mean you need someone to listen and talk too. Nothing wrong with that.
@Leah_Monet
6"Everyone says i'm pain in ass."
I don't know about others but in my view and from what I have understood from your sentences, from the way you express yourself. You are a very sweet type of woman, a person who truly cares about people and their well being.
Let people say whatever they want. You should be who you are.
@Leah_Monet
7. "Now all i really want is to save this but i dont know how. He blocked me from everywhere. I went to his house but he doesn't want to meet."
Well I don't know this guy and his nature, his personality. You know him better but I am going to be honest with you. There is something not right with this guy, I mean something is not right as far as his thinking and understanding of things are concerned.
In my view, it is not him not understand. I think he is being ignorant towards understanding things. I mean his behavior towards you would have been correct and valid if you really did something which is " Unforgivable" then it would have made sense for him to act this way.
However, from what you have told me you never did anything. What you did was a very nice thing. Showing true care, concern and being sweet are very nice things.
As far as blocking is concerned, there are many people who simply use the block feature because they can use it. This guy simply blocked you because you showed lot of care and concern for him.
To be honest, I don't think you have any chance here. Really. I mean he has blocked and he is very clear about that. Honestly it will not matter to him what you do, he will not give you any chance. it would be a waste of your time and effort and plus you would end up hurting yourself further.
I would say you should stop trying and just leave him alone.
@Leah_Monet
Anyways, I hope you are okay and if you need company or just someone to talk too then feel free to message me anytime.
Understand if you continue to sleep with him - he's only interested in your body and will ditch you for that once he find a relationship with a girl he wants exclusively.
I'd ditch hum know while you are younger and have more time with someone who actually loves you ling term and move on. His loss.
If he’s serious you need to let him go. If he still really likes you he’ll find his way back.
Trust a guy when he says he isn’t interested anymore
Opinion
4Opinion
You let go and go find someone else. And you examine why you weirdly think a guy not wanting you isn't by itself offputting enough to make you not want him.
Ask yourself why you want someone who clearly doesn't want you. Have done respect for yourself and let him go so you can find someone that does want you
Move on. If he’s done, he’s done
It's hard. I still wanna save our relation but he ain't talking.
You aren’t gonna save it
You weren't meant to be. Accept it and move on. Look for someone that wants you!
Nothing you can do.
Superb Opinion