a member

So basically I'm a pansexul AND lesbian at the same time meaning I have a bigger preference in girls I think I'm labeling myself as that because I can't accept the fact that I'll never like a man anyways this guy has been courting for a couple of weeks and asked me to be his girlfriend I said yes and now I'm regretting that I want to break up with him but I don't want to hurt him. Should I just start acting like a bitch so he would want to leave me or not?