<human>: Hi, this is my first /r/relationships post. I've been in a relationship for almost a year with my boy (I'm 21 and female, he's also 21). We've had a pretty good relationship, aside from issues last semester (we're in college) when he got too busy from me. But lately we've been on the right track. He's never yelled at me before. We've had discussions before about important things where one or both of us was upset, but no yelling. 

This past weekend we were at a party, and something appeared to be bugging him. I asked him about it and he ended up shouting at me to stop (talking about) it. He says it was just because he doesn't like talking about personal things in public, which is legitimate... except I didn't really feel like it warranted yelling. Again, this is out of character, but he says nothing else is wrong. 

What would make someone act like this? He apologized, but since then I don't think has made much of an effort to see me. It's something we should probably talk about, but if it's nothing maybe I should just let it rest. Thoughts?

Provide a brief overview of the text.
<bot>: Boyfriend yelled at me for the first time in a year long relationship. Wondering if there are things going on below the surface.