((((((((((((((((((Lex))))))))))))))))
I'm so sorry youre hurting right now. Emotional abuse is no more excusable than any other kind, it just leaves marks on the inside instead of the outside. i don't know if you've tried talking to bf about how he makes you feel when you fight, but maybe he doesn't realize how much he's hurting you. if theres any love there, and you believe that he can change and will change for you, then don't give up. try and get the help you both need. the fact that you feel guilty even though i dont think you're technically cheating probably means that there are still strong feelings there.
as for the other guy, be honest. maybe you should tell him youre not sure what you want right now. if he cares, which i'm sure he does, he will wait for you to figure things out.
please dont ever say youre not worth anything. you are kind and caring and understanding, and i think anyone who has you in their life is better for it. i feel fortunate to know someone like you. hope the advice helps and that things work out.
(((((((((((HUGS))))))))