Guy grabbed me by the waist, is he into me?

Hi! So I was at this party and started talking to this guy that I'm kinda interested in... it was crowded and we couldn't really hear each other so obviously we leaned closer, and while doing so he grabbed my waist and kept his hand there for a pretty long time... I mean I was just asking him a question, but does the waist-grabbing mean anything?

Also some background information: I've noticed him look at me several times these past few months, but I never know if he's looking at me or behind me, but it's just happened too many times to be a coincidence...

So... does this dude like me or is he interested?
Guy grabbed me by the waist, is he into me?
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