Trust him unless you have reasonable doubt about the innocence of their friendship.
find another girlfriend
Then be suspicious. He may have another girl friend.
If you are secure in your relationship with your boyfriend, don't worry about it. It's okay for guys to have other friends that are girls.
Because she loves him as a friend and not as a boyfriend.
Talk to her as friends and don't go no farther until they break up or you can find another dream girl.
From a close friend or a boyfriend a girl wouldn't mind. If its from a girl to another girl she may not like it. Also if you are not particularly close friends. Just be careful because for a girl to let another person do that usually they have to be a boyfriend or an old friend.
She likes you and that other guy and her boyfriend but does not know who she likes best.
Enquire,watch his movement's spy his mobile.text messages and find it out from his friends.
If he wants to marry another girl he's not your boyfriend.
If your friend is working with another girl to try and break you and your boyfriend up, she is not your friend. The best thing to do is make your boyfriend aware of their game and ignore them both.
You would not like it if your best friend cheated on you with your boyfriend so that is not a nice thing to do to your best friend. First, you should stop saying you are best friends with the girl when you are 'cheating" with her boyfriend. Best friends do not do that. Second, you should stop going out with her boyfriend. Third, you should tell the girl that the guy is cheating on her, even though you will need to tell her that it is with you. If he does it with you, there is a real good chance that he would cheat on her with someone else. Finally, both of you should dump the guy.
Ice cream, fat foods, Forgivness, And bad mouthing him with your Best girl friends only!