first, don't be resentful at the other person. It isn't her fault that the guy you like has different taste. Tell him, or find someone else.
iam in love with this guy but i do not know if he likes me or some other girl
When he has a penis.
Have someone else do it for you.
you would let ti alone. if it bugs you that much, tell a rumor about her to your love that she is secretly dating.
If your guy is in love with someone else, cut your losses and move on. You can't make someone love you if they don't.
find someone else to like
It means he wants someone else but is flirting with you as a second resort if the person he likes doesnt like him back
leave them be and get your own guy
To make this guy jealous, of course.
Become friends with the guy she likes and she'll notice you. Act friendly and cheeky around her and maybe she will play along. she will get to know you and then maybe you might click. These things will get her to notice you but you cannot make someone love you. Love can't be controlled. Real love that is...
Leave him, he's apparently in to someone else.
Then he's human.