It sounds like your moods are going up and down in reaction to what's going on around you. I don't know a lot about it, but from what I've read about DBT, I think it's supposed to help you not be so reactive, to put some time and reflection between the emotion or thought and the reaction and to help with what triggers these emotions/reactions. Others' can probably speak with more authority about what DBT involves, but it sounds like something that might be useful for you.