<human>: The problem that I've been having is with my attitude towards a lot of things that happen. I get really upset/disappointed very easily at things that a lot of people say/do, but its in particular causing problems with my partner. Our relationship is mostly amazing, we love each others company, get along really well (most of the time), hang a lot, have similar interests in college, and the way I've been acting has been slowly destroying what we had.

 Basically, I can be really happy one moment, but at times, such as when I want to get coffee or something and she doesn't want to go, or just hang out in general and she's busy with something, or just when we sometimes disagree on something trivial, I get wicked mood swings, and just feel like absolute shit after. I know logically that these are not very big things and are pretty much meaningless (we spend a bunch of time together regardless), but after certain things happen, I just can't help but feel depressed. 
 This usually leads to me irrationally blaming things on her, her becoming upset because she feels like she makes me that way, and its gotten to the point where she says where she can't even do things without thinking whether it will make me sad or not, because I take things so hard.
 We love each other, and other than this problem our relationship is going well, but its a very big problem and I just don't know what I can do to first of all fix her feelings towards it, and two, prevent it from occurring in the future. 
 Any help would be very warmly appreciated. I just don't know what to do.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: I get serious mood swings, and gf thinks that she's doing something wrong and making me feel bad, when its not a big deal at all