first of all, find out if it's just a friend or not. do NOT jump to conclusions. if it is something more, then the twoof you should talk about where your relationship is going.
if i where you i would tell the girl that likes that boy that he has a girlfriend.that is what i would do.
You should tell the other girl and both break up with your boyfriend.
your boyfriend is just being completely honest with you and he obviously doesnt like you as much as this 'other' girl. i would appreciate him sharing this with me instead of cheating on me and going behind my back.
you dont tell her, let her find it out for herself,
Just tell him gently....."listen, I have a boyfriend. Just saying"
If you want your boyfriend back, who is currently with another girl, simply approach the other girl and tell her to stop spending with your boyfriend.
ask
Because she loves him as a friend and not as a boyfriend.
First,look at all sides of the situation. #1.your boyfriend does not want to tell the girl that he goes out with you because he is probably with the other girl.If he loves you then he should have no reason to hide it from her that you two go together. Take it from me,unknown to your boyfriend,ask this girl if you and she can please talk,tell her you are not interested in fighting,you would like to clear the air because you do not understand why she would want to fight you.If she tells your that your boyfriend is also her boyfriend,let her know you didn't know and leave that loser alone.
Until a girl tells her boyfriend the relationship is over then sleeping with any other guy or guys IS cheating! Tell the boyfriend first and then you are free to do as you please. Going steady is not as finalized as marriage, but you have to think of your boyfriend's feelings and how would you like it if the shoe was on the other foot and he was sleeping around with other girls while deciding to eventually tell YOU he wanted to split up?
tell her that her boyfriend cheated on her. she needs to know.
Don't tell her you love her, tell her you like her.