Aquarius man help!!!!!?

Ok I met this guy on a personals site. We talked alot before we met. He is a very sweet guy. He had told me previously that he always is in relationships and that he isn't good at being alone, and when the talk of casual sex came up he said that was something he never has really done. We fast forward we meet a few weeks later the conversation flows and we have alot in common. But before we met I did tell him I was just looking for friends and if anything came out of that then fine. Well I ended up being very intrigued by him. I really enjoy his company and I love talking to him. Well since we have met he usually text me early in the morning just to say good morning and always good night. Well the conversation of sex was brought up, and well being a cancer that is one of my favorite subjects. So basically he put it out there that he wants to sleep with me, in other words he says we are friends so we should help each other out. I am really confused. I mean when I asked him about doing this he said again that he never has except with an ex one time. So I mean our conversation flows he is apparently attracted to me, I don't get it? I know aquarians don't show emotions and don't get attached but he is a long term kind of guy.. Did I set something wrong with this guy? Why me? And he did recently get out of a short relationship less than a month agon