My paranoia is ruining my friendship

I know I've been on this before with guy problems, but I'm surrounded by so many of them, lol.

Here's the thing. I've been friends with X for nearly two years now. He was the first friend I made in college and one of the closest friends I have. It's only in the last month that I began to crush on him. But it's one of those crushes I have where I never expect anything of it (I have a lot of crushes), I simply wait for it to run its course, and in this case, X and I are much better as friends. I've been told that I unintentionally flirt with guys I fancy whether I want anything of it or not, but I never got the impression X noticed. That is, until a few nights ago.

I attended a party at X's apartment, along with a girl who overshares her personal life and sticks her nose where it doesn't belong. She got it out of me that I fancy X and quickly informed me that she brought it up with him, discreetly. She said to him, 'So, I saw you and Y on the balcony, what's going on there?' This is what she said he said: 'I love Y, she's a lovely girl and a great laugh. I know she feels more for me, but I just see her as a friend.' This freaked me out because a guy once found out I liked him years ago and backed off from me, but the nosy girl assured me that X's behaviour hasn't changed around me. I was satisfied with this and became delighted at the nice things X said about me.

'But you need you calm down around him,' said the nosy girl.

This sent me back into a panic. She didn't explain where I need to calm down, so now I'm analysing my behaviour towards him. I mean I hug him, I link arms with him, but I do that with my other male friends and he knows it, and plus I did it well before my feelings changed. Now I find myself thinking about what I say before I say it, thinking about what I do before I do it, not speaking to him unless he initiates it, and sitting away from him. It's my own fault, but I've obviously done something to arouse his suspicions and something else to confirm them. I could kill that nosy bitch for getting involved, you'd swear I was going to jump him with the way she was talking to me.

What do I do now? Should I talk to him about it and clear it up? Or will that just make things worse? Please no one suggest the backing away thing is a good idea, because he's going to get suspicious, he's clearly not blind to my behaviour.