If he wants to be alone then all you can do is give him his space. People handle conflict and being upset differently. Some people want to talk about it immediately while others prefer to have some space first.
You can't force him to feel differently, you just have to accept that this is how he deals with things. I'm sure once he has his alone time, he comes back and is ready to talk. This doesn't mean he doesn't need you or that you're useless though.
Respect that he wants to be alone.
Don't force him to talk about it. He'll come to you if he wants to talk.
Simply say something like "I respect that you would like to be alone but if you want to talk, I'll be there for you."
people deal with pain in different ways and this is the his way. Respect his wishes and when he is ready he will talk to you himself
Don't tell him how it makes you feel when he's dealing with his stuff. It's very very annoying when girls do that.
Your job is to hold down the fort while he goes and does his thing. If there's food when he returns, then you get bonus points. Do this well, and you will have earnt his unyielding loyalty.
I repeat - shut up, and have food ready. That's it.
Please understand this: there is no "normally" in human emotions. I am just like him, I don't want comfort, I want to "get over" whatever it is that is bugging me, and on my own terms, in private. He is not trying to offend you by refusing your help, but he can't deal with being comforted for whatever reasons. Try to see it from his perspective.
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Stop. Don't make it about you. It's his way of coping, so leave him be. Just be there when he comes back.
When guys get upset they usually want their space, not their girlfriends or anyone else bugging them and dwelling on them being upset. They just need their alone time to figure things out and work through it. Respect his wishes and don't push him.
" I don't know how can I make him feel better if he wants to be alone " - Don't, just don't. You can't change people and you can't make them better.
It's human nature to want space.
May be he doesn't trust you that much or he has really need to be alone. My boyfriend also wants to be alone when he is upset mostly because he doesn't want to say harsh things to me.
Most guys prefer to deal with sorrow or other problems alone.
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