He didn't try sleep with me- a sign of interest?

I met this guy not long back when I was out (he was a friend of a friend) and I'm not the one who usually falls for someone easily, but this guy was my dream guy, from a first impression way. Anyways not wanting the night to end I went back to his (parents) house (since he was up visiting them). It was a great night, we got along really well, and I was more impressed that he didn't try anything, and we just made out all night. However, I was wondering could that be for many reasons or is that a good sign, in that he might of been interested in more than that? I know its hard to judge when we just met, but most guys I'm used to at least try, or want to.

theres a few reasons I thought one being maybe that we'd both had a few too many drinks?

Or maybe something to do with him? But I'm not really sure.
He didn't try sleep with me- a sign of interest?
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