I don't experience as many mood swings when I'm not romantically interested in anyone. It's definitely lonely, but life seems OK. All hell breaks loose when I catch feelings for someone, though. Suddenly everything's chaotic and I can't find stable ground. 

I'm able to do well in other relationships. Friendships are fine. I have close professional relationships. The only ingredient that messes up everything for me is literally just romantic love. Am I alone in this?