Don't know if she likes me...

Hi there, maybe this question has been asked a million times, or maybe I shouldn't ask it here, but I'll still ask it.
So, there is this girl in my class, we are very good friends. I fell in love with her when I didn't know her very well, and I got closer to her. Then I told her I had feelings for her. She said literally: "I don't think I feel the same way, but we can still be friends." So I thought ok, she doesn't have feelings for me, and I tried to get over it. So we didn't talk very much for over a year, and I started to hang out with other people. Then, just when I nearly got over it, out of the blue, she starts teasing me in class. I didn't really know what to make from it, and didn't really play along, but eventually we became good friends again, and I fell in love with her all over again. I absolutely didn't wanna tell her how I felt 'cause I thought she already had made up her mind about it. But one night we went out with some friends for my best friend's birthday, and I got really really drunk. My best friend came to talk to me and said that I was killing myself by not telling the girl I loved how I felt about her. I still didn't wanna tell her (btw, she was there that night too). Then my best friend decided to tell her without me knowing it. He told me afterwards. So the girl I loved came over to me, and told me we should talk when I was sober again. So the next day, when we were all alone, we talked. She said (again literally): "I don't think I have feelings for you. And it has not been a long time since I broke up with my boyfriend, so I don't think I'm ready for it yet. But I think friends are much more important than a girl or boyfriend." So I thought: damn, second time!
We stayed friends and we are very close now, but my feelings for her won't go away. And the past few months she has been acting extremely jealous when I talk to other girls. She asks me if I want to come see a movie at her place, or to go to the movies, just the two of us, etc. So now I absolutely don't know what to make of it anymore. Does she like me, or not? Another girl with who I am good friends told me the girl I loved had a crush on me. But I don't want to screw it up again. So what should I do? Does she love/like me? I don't really have a clue...

Your help would be greatly appreciated! :)

Regards,
Discus


PS: I really love this girl very much...

She doesn't see you romantically. Sorry dude, but a girl who tells you that, point blank, to your face, TWICE, isn't going to change her mind. She waited for you to sober up because she wanted to be sure you completely heard and understood what she was saying.

You're like a brother to her, THAT'S why she's jealous. It'd be like watching your sister get hit on by guys; it's not romantic jealousy, it's "get the hell away from my sister" jealousy.

Give up, be friends with her, find another romantic interest. If you care about her you need to decide whether you'd rather have her as just a very good friend WITH NEVER ANY ROMANCE, PERIOD, or not have her in your life at all. She doesn't want romance with you, she wants to be your friend. Pick.

And I'm sorry to be so blunt, I understand it sucks and frankly if you can't be around her as just a friend that's perfectly acceptable and understandable and you just need to tell her that. "I care about you very deeply but I can't keep being around you as just a friend, it hurts me too much, I'm sorry."