Should I keep trying or let it go?

There's this girl who lives down the block from me. I'm infatuated with her. I knew one of my friends knew her well so I organized a get together. Hey came over my house and we had a great time. The next day she message me on myspace saying how we "live to close to not hang out". This is where I made my mistake. Instead of making a move I simply messages her that he could come by whenever. After that itried texting her a few times she replied once but after that no reply. I think shes hangin out wig another guy but I'm not sure. I texted her today asking her when were hangin out but no reply. What should I do?