<human>: Can you summarize the given text in a few sentences?

I met this guy at the beginning of the summer, and we started off as friends. We met on Facebook through mutual friends, and we hung out in person once with a group of other people, and it went really well.

The next time I saw him, we were alone, and we ended up hooking up. This was last week. We've hooked up a total of 4 times in the past week. And by hooking up, I mean that we've had everything except actual sexual intercourse (which I told him I didn't want to do).

He's a really nice guy, and he's really respectful towards me. We also have a ton in common. The other day, he asked me what I looked for in a guy. 

I really want to try out making it official with him, but I'm really not sure how to start/approach that conversation. What should I say to let him know that I'm interested in more than just a friends-with-benefits sort of relationship? 

I'm not even sure how he feels about me. While we were hooking up, he has said things like "you're really beautiful", "you are so sexy", "you are absolutely adorable", "you have such a nice body", etc. But then again, he could be just saying that in the heat of the moment.

What should I do?
<bot>: I'm (18 f) interested in making it 'official' with a guy (20 m) that I've been hooking up with as a friend (FWB), and don't know how to initiate that conversation.