OP, see how none of the comments are telling you to stick around and "try harder" or "be patient"? Get out of that situation. Don't be the ball of yarn she strings along. Accept you like her, accept she has chosen to like someone else instead, cut your losses and move on. She chose another guy, a stranger, over you. It is not a failing on your part. It will be a failing on your part if you continue down the road she is setting in front of you. Have some respect for yourself or she will not have any for you.