Maybe try finding out if shes happy with her boyfriend. If shes not then something could eventually happen. If she is, and you seriously like her, it may hurt but you should know that theres nothing you can do
A Girl/boyfriend (seriously)
Dont worry about it, seriously.
Just talk to start with and then just go with the flow .. seriously that's what boys like i promise u baby girl xxx
Then she has to choose you or her boyfriend.
Does the girl know you like her? How long have you an and your boyfriend been together? And are you asking what should you do?
Try an show her how cool you are compared to her boyfriend
If he is her boyfriend, hopefully, she would like him.
Wait till she doesn't have a boyfriend or move on
Treat her better than her boyfriend does.
You get beat up
Leave your cheating boyfriend... Seriously, put yourself in the other girl's shoes. Tell him if he really wants to be with you, he'll leave the other girl.
Find a way to impress her.