Yeah, moving on is the only way to go. I'm going to be honest with you, for the next few weeks it's going to SUCK. You're going to think about her all the time and want to go back on your decision, but DON'T, because wait a few more weeks and you won't think about her at all, if ever.

Now is a good time to get your life together. Get some hobbies, make some friends, hang out with them more, try new things, make sure the next time you see a girl you have the hots for, you are truly ready to go and take her. I've been through this before, and it may feel like the end of the world, but believe me man, it's not. Like someone said above, there are so many girls in this world it's ridiculous.

And one more thing, just to throw it out there, don't base your life around a girl. Make sure before you go for another girl, you have a life of your own and you are simply inviting her into it, instead of making her your life.