Will you be my girlfriend online? Just kidding.
But seriously, like >>2 said. I think you should get your own boyfriend. Find a better guy than him.
You were not interested the moment he asked you out but then you hook him up with a friend of yours and now you are interested, jealous, and suddenly probably feel like you want to be with him instead of her. Still, it's better to have a relationship with a different guy. You might forget about the guy who asked you out. You can have what they have, just ask another guy out that you like.