Why won't my ex accept I don't want to be apart of his life?

I was good to him throughout the relationship and did my best to show up because I did and I do still love him. He got put into jail and at the same time I found out he was cheating. Well, we both went out separate ways and I told him I don't want to be friends, I wish you no harm. I just can't be around around and don't want to talk to you. So about a month went by and he reaches out again, towards the end of our conversation I told him I wanted to be with him and he's like I just want to be friends with you and I told him I'm sorry I can't do that for you. He then started getting upset with me and it got to the point where I had to block him because yes, it is asking a lot out of me when I'm in love with him to just be his friend when he's the one who wanted the relationship to begin with. I feel like I did the responsible thing but it's hard for him to let go. If I can love him so much but cut things off because it's the right thing, why can't he respect my decision?

Why won't my ex accept I don't want to be apart of his life?
Post Opinion