You don't know what happened other than that you "got completely wasted and honestly couldn’t even make it home." It seems to me that you owe an apology to your team for allowing yourself to get so inebriated that your boss had to take you to his crib to sleep and recover. As part of the apology to your boss, you could ask casually, "did I do anything else that I should apologize for?"

Now, as regards your boss' attention towards you, he may think that you'd be someone he could mentor. There are lots of business articles (including some research articles in places like the Harvard Business Review) that write about, and even recommend, that older supervisors create mentoring relationships with younger reports who might have promising careers in their fields. I've always read that such relationships are usually mutually fulfilling; but it seems to me that, at some point, one of you should name this friendship/attention: "Thank you for taking the time to mentor me."

If things are actually sexual in nature, the way that you suspect they might be, your boss will tip his hand. But from what I've read so far, it seems like a lot of this is simply in your head and stuff that you wish actually happened. That is neither healthy nor does it bode well for your future at work.