<human>: My boyfriend and I have been together for almost four months now. Overall, things are great. We have good communication between us and we never really have arguments.

About a month into us dating, he told me that I was overweight and ate out too much. Obviously, him saying that upset me, but in all honesty, he wasn't wrong. I began a hardcore diet, and we talked about things. He apologized for the way that he told me his feelings (he just randomly brought it up), and he attributed him not being tactful to him being stressed at school. He graduated in May, and I've had my own issues with academic stresses, so I chalked it up to that, and we moved on.

Fast forward to last night. We were talking, and I have this little thing where I'll ask him to tell me something good. He'll tell me something, and I'll do the same, and we'll go from there. I asked him to tell me something good, and he said, "no." He then went on and unloaded on me saying that something is wrong, but he's not sure if it's us or something else. I should add at this point that he's at a job he doesn't like, and he just took his first driving class last Saturday to get his license. He agreed to some space to give him time to sort things out, but I'm not sure why every time he has stressful moments in his life, he picks apart our relationship when it's not related to his stressors at all. Any help would be greatly appreciated.

Can you condense the text into a few key points?
<bot>: Boyfriend of almost four months gets stressed out and picks apart our relationship when it has nothing to do with why he's stressed.