I was on your bf side until I read one of your comments. I was never jealous of my wife during our relationship, because I figured if I gave her all I could and she still wanted to be with someone else, then there was nothing I could have done to prevent it, and I trusted her not to cheat and to tell me if I wasn't enough. However, your comment indicates that he not only doesn't do all he can for you, he barely does anything at all. To me this seems more like he will keep you around for the things he can get out of you, but doesn't care for you further than that. Personally I would leave him. But I also would not date the other guy as he works with you, and does not seem to respect existing relationships. But I could have the wrong take on him as you seem to give him as much interest as he does you.