<human>: Can you provide a brief overview of the text?

Well I've been searching for a story in this sub for a while and haven't found anything similar to mine. Here's what's going on.

We've been dating for over a year now and have been living together for most of that time. He's never had a serious girlfriend and the ones that he did have only lasted a few months tops, so he's never had to get into the real side of relationships until me. On the other hand, I've dated long and short term. And have learned from experience that when you bottle things up your going to eventually explode. He has also made it very clear to me that he's never had anyone to talk to. He is often stubborn and a do-it-yourself kind of guy. And has always gotten away with shutting himself in. He seems to think that not talking about your feelings is easier than dealing with them. And even though he's found his breaking point a couple times... He still seems to stay quiet.

Whenever I can tell that there's something wrong, I'll ask and he'll either tell me he's fine, go to sleep, or get short tempered. I'll ask a simple question like, "what's for dinner" and he'll snap back with a snarky response. I'll ask him what's wrong and he'll get even more agitated. Then when I try to talk to him about it, he sees that ad arguing and doesn't understand why I'm "arguing about nothing." I'm not trying to argue...I'm trying to fix and make thing better. He doesn't know how to talk without arguing or getting angry. How do I get him to open up to me and talk to him without it escalating to an argument?
<bot>: boyfriend tends to bottle things up and gets upset when I try to help. He often thinks I'm arguing when I'm just trying to figure out what's going on in his head.