There's this guy and another girl he likes but I like him too.?

Ok so this guy 'Travis' keeps on haring the poor girl- but he talked to me every day- I was like their "Link" to each other. He liked me- he has for a while, so I figured it was just a cover-up for him liking me. So I tell the guy the girls e-mail- which was really my E-mail, and he sent "her" his phone #. I come to homeroom the next morning and he says, "Some friend you are!" It turns out my backstabbing clmate told him all of it. How do I win him back?