<human>: Can you summarize the given text in a few sentences?

I've noticed within the past couple of years that the littlest thing will trigger a very rapid mood swing in me. I will go from feeling fine and happy to feeling extremely angry. Example: I was hanging out with my boyfriend and he tells me that he wants to call it a night because he's tired. All of a sudden, I'm pissed beyond belief, assumed that he just wanted to get rid of me, and told him then and there that I want to break up. He was very shocked because one moment I was fine and making jokes, then I suddenly got mad. A couple hours later I realized how stupid I acted. It always happens like this. Tiny trigger --> explosive anger and overreacting --> acting impulsively --> calming down a couple hours later and realizing my mistake. What is wrong with me? I hate that I am like this. Am I just emotionally immature? How can I stop being this way?
<bot>: I have mood swings where I go from fine to extremely angry which makes me make stupid decisions that I always regret later.