just tell him (boys like it when girls tell them they like him)seriously
speaking as a boy, i say that you try to take your mind off it by doing something you love and just do that until you like someone else.
he may not like you back and ignores you because of that, or he may not understand what you are saying, or he may already have a girlfriend.
Tell his girlfriend or tell him to dump her for you
If he already has a girlfriend, likes this girl a lot, and they are comfortable together, then you should not be trying to get this guy away from her. It will only cause problems, mostly for you.
If a boy you like has a girlfriend you should first tell the boy how you feel. If the boy reciprocates your feelings or wants to spend time with you, tell him that you won't spend time with him until he breaks up with his girlfriend. It's never a good thing to break up a relationship.
If he already has a girlfriend just back off until they are broken up . Then say how you feel. Especially if you don't want to look too pushy.
Tell him how you feel towards him. You never know what you had the chance at untill it's lost. A boy always likes it when a girl tell him how she feels.
If the boy has a girlfriend, find a guy that doesn't have a girlfriend.
just get another boy, the world isn't fair so take it like a woman. There are lotsa cute guys out there!
If he likes you better, then why does he even have a girlfriend?
because he does, he just isn't ready for a relationship.
You tell him you like him. If he already likes you you'll have a date in no time.