Same with me, Lex. If I don't let my feelings out, they pile up and eventually burst in one big explosion. My boyfriend sometimes makes me feel controlled (not always), but he generally doesn't have a problem with me being open about my problems. In fact, he's told people about them without my consent. :-/

Anyway, I don't think you should be ashamed of being bi or anything else. I understand there might be people you feel less comfortable telling, and you should decide if and when you tell, but you shouldn't avoid telling just to appease him. In any case, you can come here and get some of those feelings out when you need to. I hope that helps some.