All over me one minute, ignored the next , what's going on?

So I've been talking to this guy for a while now and he's all over me when he texts my cell saying things like I wish I was with you and I'm coming over to see you sometime. Now all of a sudden I'm totally getting ignored , I haven't done anything wrong so I don't understand why he would do this?
All over me one minute, ignored the next , what's going on?
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