I had been hanging out with a friend of mine for a couple of months. Started to feel an attraction, and started the flirting, to see if there was interest on her end. Sure enough, after all this time of trying to get to this point, as soon as she said she wanted something to happen.. The feeling i had upto that point vanished, and I'm now crushing on someone else ill never have a chance with. I now look at her as no more than a friend, after all this time, i now feel like shit for leading her on. How do i explain it to her, without coming across as the asshole ive been?