I need an opinion! My heart is broken...?

Ok I'm an 18 year old Pisces and my best guy friend is a Taurus. I've known him for two years now and we are inseparable. The worst thing in the whole situation is that a few months back I realized that I have fallen for him. I've helped him through a lot and he has too. Most of the time he tells me that I'm one of the most important people in his life and that he loves me a lot. At times he makes me think that he might fell something for me too, but he then says something that makes me feel stupid for thinking so. A few nights back he told about an old friend of his (a girl) that likes him and asked him to have sex with her. To say I was shocked is the least. We were talking about it through text messages and I decided to play it cool and our conversation went more or less like this:
I: "Well. have fun"
He: "Are you stupid?"
I: "No, I just have no right to tell you whether to have sex with her or not. Do whatever you want"
He: "Well, it's not like I see her erotically or anything, so I will just talk with her and see what I will do"
I: "So, are you actually thinking of doing it with her?"
He: "Probably, I haven't decided yet"

He then changed the subject. I am really hurt and all I'm telling myself since that conversation is "Just get over him already. Forget about him", but it doesn't seem to work all that well. I've been having feelings for him for almost six months now. The other night he told me something along the lines of "Can I ask you something? You are a pretty and hot girl, but all this time I've known you, I've never seen you with a boyfriend" and I told him "It just didn't happen I guess", while on the inside I was giving another answer to him: "It's your fault you know". Anyway. The thing is that I can't understand what he may feel about me or whether his feeling for me have changed lately. And I'm confused. Any suggestions about what I should do?

Well I have no Idea...

You know, I;ve thought about trying to date another guy and just move on, but then another thought comes in my mind "What would he feel if he saw me kissing another guy?". I just don;t know.

He defenitely isn't a player. That is why I was shocked when he said that he thinks of having sex with that other girl. He calls me his bestie at times and that is why I just can;t say anything to him and ruin our friendship. I am so damn confused. But no, I can't just go and tell him how I feel and I always wait for him to make some move but nothing. And the more I think that he might sleep with that girl, the crazier I go.

I just don't have the guts to do it I guess. Isn't there some way for me to make him make that move? Like, drive him to the point where he can't hold it in anymore?

Ok I understand that. I just feel uneasy and I don't want to seem like a fool.

Taurus sucks, run away.