how can i either get him, or get over him?

Okay, so last weekend, me and this guy and all our friends were hanging out and drinking together (I'm 17), and me and him have been friends for awhile, and we've never been more than that, but that night we hooked up, and he asked me to go on a double...

date with his best friend and my really good girlfriend. Also that night, he had nowhere to stay, so I let him stay with me.
Now, I've seen him twice since then, he's completely ignored me, except for a wave, and he won't talk to me. One of my guy friends talked to him and he said he doesn't like me like that. So it was all bull crap just to get with me.
How should I act towards him?

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I saw him again, and I chose too just keep my distance, but my friends noticed he was always looking over at me. He would try to sit in the same area as me but still wouldn't talk to me or actually sit with me. Then, he came and sat right beside me to have a conversation with me and my friend but right when he sat down my ride was leaving so I had to leave, and he said I was just sitting down to have a conversation, and then when we left all I got was a bye girls. I always want what I can't have, but who doesn't? How can I either get him, or get over him? (preferably get him )