So if someone is blowing hot/cold, should I back off more?
This guy is really confusing me. He knows I like him, but he seems very hesitant. He acts strange when we're around people, very nervous and avoiding me, but is nice in person. He keeps on saying let's do something just us two but then we don't.
If I stop contacting him for a few days he starts calling me, and he is always saying nice things about me. I know he is not dating with anyone.
Any insights?

Let Him Chase You. Keep Busy, Date Other Men, Take A Step Back... let Him Be The One To Initate Things Up Front. If He Doesn't Then Move On To The Next.

I agree with the above, this dude seems like he's dating more people than just you right now.. don't waste your time on him.. move on..

Thank you for thoughts. Just to make clear though, as I mentioned before, he is not seeing anyone at all right now. And we're not exactly dating.

Yea, "we're not exaclty dating" Im sure were his words.. this guy can't even come to terms with the fact that you're dating..

I "hung out" with this one guy for 3 weeks and he still couldn't say the words that we were dating, we were just "hanging out" turns out he was just hanging around so he could have sex, Which I did NOT give him so he bailed.. nice guy huh?

Just decide what YOU want happening with you two and pursue that.

Friendship? You got that already. Don't fret it.

More? Decide that and tell him. He doesn't HAVE to reciprocate, but you can still be honest. No harm no foul.

Worry less about him changing his ways, present yourself/needs honestly. Move on if things don't develop. Simple enough.

I agree, let him come to you. Show him your not up for the games.

You're "not exactly dating" so you cant be sure that he's not seeing anyone else... Just because he knows you like him does not mean he's obligated to stop seeing other girls, when he makes it clear to you that you two are a couple then you can make that assumption

You say that he knows you like him but does he feel the same? You have to be direct, ask him what his intentions are... you don't want to waist your time with assumptions so make it easier on yourself and ask him to be sure that he feels the same way that you do.