It sounds like you might have some anxiety. I think the emotional fragility is related to the emotional abuse you endured growing up. I'm not a medical professional, but I have almost the exact same problems you are writing about. I, too, put up with a lot of emotional and psychological abuse growing up. I'm the same way, with becoming emotional and out of control over little things. I never cut but I did self-injure in other ways. I think it is a symptom of having immense emotional pain built up from years of depression.

Again, I'm not not a medical professional. Just offering my opinion because I have a lot of experience with the problems you've written about.

It would probably be in your best interest to speak to a counselor, which I know can be weird or scary. Sometimes there are things we just can't tell our family and/or friends because they wouldn't know what to say or how to handle it...