I don't know what to think or anything.. but I really hate the fact that my g/f may be bi, than she can cheat on me whenever.. her friend is bi, and they always just joke around but my g/f ALWAYS jokes around, it makes me wonder what is ever true.. I don't want a bi g/f because than it would just make things suck. Cause I wouldn't know if she cheated on me or not.. but I am just pissed right now. What should I do??

Confront her tell her how you feel and that you feel like she's f---ing with your emotions don't take her being bi personally its nothing you did or didn't do if she can't figure out her gender preference get your self a hetero female... good luck ;) ;) ;) ;) ;)

Oh man that really sucks... but seriously just cause she jokes about it doesn't mean its true she could just be trying to gauge your reaction to it all.. you need to discuss with her your feelings and let her know how you feel and point blank ask her are you bi? If you love her remember that true love is unconditional but it doesn't mean to let yourself get run over and cheated on repeatedly just talk about it and get your insecurities out so you can best find which way to move in your relationship.. if she loves you and is bi she would understand your concerns and respect your opinions if you love someone you are faithful despite your orientation if she isn't the type of woman to be solely with you bi or not move on because if she's cheating she's cheating guy or girl and it could just as easily be another man as another woman if she is bi.. so get it all in the open and let things air and choose from there what you will do