Give less. Give less time, give less phone calls, etc .Make the room for him to fill that space and if he doesnt wonder where you are or panic at the thought he might be losing your interest then he doesnt miss you and want to fill that space.
Tell him if he truly likes you he'll break up with her.
ask
Test him when he likes you too!
Tell him how you truly feel. If he likes you back, you will know it by his response.
then you gonna have to ask him somehow.
Do what everyone has been waiting to happen: ask him out. If he truly likes you, then I'm positive he'll say yes.
Sure, if you like him and he likes you, then go for it.
assk her or her friends
ask the dude
ASK HIM:D
sure!
Go for it!