Does that make me bisexual?

There is this guy I like. I'm 19 and he is the first guy I've ever liked or been attracted to. I have been attracted to girls ever since I can remember. I don't want to date anymore girls. I want to be with a guy I know I would feel more secure and happy. I think he's so beautiful inside and out. He is funny and he has a hard working personality. We actually hung out at the mall the other day and it was the most amazing feeling ever. But....he has a girlfriend. She lives in Tallahassee. He visits her often. I haven't done anything but admire him secretly. Anyway, I decided to let it go and just focus on myself. But the thing is...am I bi now? Lol..