Hi confused,
I think that you should let him go ahead with this other girl. I know this hurts, but believe me, it will pass. And you deserve a guy who sees you as the prize you are. Your soulmate--the man who you are truly meant to marry--wouldn't talk to another girl at a party and then not tell you about it.
Trust me, this guy is not worth your time. You're going to move through the pain--it is completely temporary, trust me--but if you 'get him back' he'll just do this to you in one way or another over and over again.
Instead of spending all of your energy worrying about how you can get this guy back, work on realizing that you're worth a guy who treats you well and who doesn't hurt you. When this one comes crawling back to you--which he will, once he sees how evolved and self confident you have become--believe me, you won't even
want him anymore. He's done you a favor.
Good luck!
