Don't know why?

Don't know why I punish/torture myself when something is done by someone else. Like a few days ago I have had a fight with one of my friend, and until the fight was resolved I was very much disturbed. Due to such kinda stuff I skip the food, or do something which is not to be done........... The major problem is that everything usually is hidden deep inside, not reveled to outer world which sometimes hurts even much more.

Sometimes over any minor issue like something said by someone, or seeing something or even some thought(present/past) I suddenly found my mood crashed. It has became so fragile that sometimes even a small ignorable issue cause it to shatter badly. It has become like a bubble which flies happily and unbounded but just a small touch and whooooosh its gone. And when my mood got rejuvenate I realize that how stupid I am to get this done. How can i do such things again and again? Am I loosing self-control ???

Some of my friends often knows about everything about what had happen but they are sitting so far that they cant do anything for it, even they try their best but sometimes its not enough, sometimes distances does matter....

Finally by the time I come out with some solutions, which often works for me. Its just to talk to some loved one it may be your friend or family. Talking about this issue or not, just talk, talk anything or everything, more you talk more you feel good. Talking relaxes your mind and distracted other thoughts. But again there is a drawback here too. Like if sometimes you call someone, and if (s)he is busy or don't pick the call. Then I have just three words for such situation. "GET WELL SOON"
Another is to pen it down, just write it down somewhere someplace like your diary and you really feel well. And in future whenever you read it, it will really bring a big grin on your face saying yourself a stupid for such stuff...