first few times, I waited, got all hurt. I liked them, so I didn't want to write them off.
now I move on. If they ever show up again, they get ice. One virguy did this last year. Had the nerve to ask me if I'd change my mind, as if I had rejected him. Psh. I told him "you made your decision", and I walked away.
if a guy is into someone, he'll tell her he's busy and can't date. If a guy just disappears, he isn't into the girl. Probably just keeping her hanging while he pursues someone he wants more.