You make it sound like you're punishing yourself, as though you think your emotions make you unfit to be in a relationship. Try not to think of it like that. If you do you'll only perpetuate your bad feelings. try to find a positive reason to be single -- you can do what you want, you can spend time with whatever friends you want in any venue you choose. You can dress and act however you feel. And best of all you can get to know yourself. These are positives.

I get very emotional in relationships as well. When I'm facing a break up or I feel I'm starting to become rejected I become very unpredictable. I started telling myself I'm unfit to be in a relationship, that I just scare people off and make them feel as horrible as I feel. But what I realized is that I can't let myself think like that. Everyone faces hardships, but the key is not to let those hardships bring you down. Take your past experiences, take the pain you've felt, and put it in another light.

Sorry if this doesn't help. I'm just going with what I've been experiencing over the past few months. but I wish you the best of luck. You're worth feeling happy, whether you're single or in a relationship.