What should I do to get my ex girlfriend back?

Well,me and my ex girlfriend went out for two years and nine months and I kinda got into a horrible situation with face book . I owned one and she didn't I helping out my sister with a problem with her boyfriend , my sister wanted to see if her boyfriend was cheating on her and so I had to activate my facebook from September 2010 - January 2011 to play "undercover" but I wanted to tell my ex girlfriend SOOOOO BAD!!! But I asked my sister she said no Don't tell her anything that "oh I'm a girl and I would know how she would act to this type of situation" . So the big problem is that my sister said "okay I will make a fake facebook and I will pretend to be some random girl that your supposedly suppose to date" so she made the fake facebook and she was thrying to use the fake facebook to talk to her boyfriend and her (my sister) "boyfriend was flirting back with this fake person" so later on in january my gf asked do have a fb I said "no" :/ I wanted to tell but mind said "no" and my heart said "yes" :( .... ends up happening karma caught me and me and my gf and I were on skype talking and stuff so I was on facebook about to deactivate this stupid facebook account and BOOM! I HIT THE SHARE button on skype so w.e I saw she did too! So I try to explain to her the whole situation and she didn't wanna hear it because what she saw on my facebook was me married to this "girl" who really didn't fucking exist !!! I tried day after day to get her back but nothing ! I even had crazy thoughts in my head that I don't feel like sharing but february comes along and stuff started to change . she called me back and we started to just talk at first like bf and gf but than she said we can't ! So now what I did was I left it as it was and she was just my friend . she said maybe in the future we can go back out but as of right now NO! so a few months has past me and her were TALKING EVERY DAMN DAY a little more than friend but less than bf & gf . I tried to ask her back out in april on our anniversary but she found out a day before because I told her best friend that I was going to ask her back out and she was like yeah thats cute do that and what ends up happening I get FUCKED OVER! Its pretty much that the bff ends up tell her the whole surprise and my ex gf confronts me and I asked where'd you hear that from and I end up breaking like egg saying "yes that was going to happen" so me and her stop talking that I hit her up the next day and end up talking like everything was fine until july I told her that our friend ship isn't the same I miss "us" more than anything. I told her that and she was like "I can't be with you" and that than we end up talking back every single day and I feel to ask her out again I mean I learned my lesson and I'm ready but I'm nervous She is my first love but I'm not hers. She doesn't have a bf and I don't have a gf . I llove her a lot and would do anything to be with her . SO My main question is this year 2012 I would ask her to be my valentine?

Ahh ! That's the sweetest thing ever ! I know a guy who's doing the same thing only not the same scenario .
Anywho ...
That seems like a pretty good idea . Just don't tell anybody this time . But , try not to wear your heart out on your sleave . You seem like a great guy , but hopefully she notices that too amd then falls in love with you like you are with her .
It's like a perfect love story ! Sort of .
Yes . Ask her to be your Valentine .

Wow...that is quite a story. I'm a romantic at heart, so I say go for it! Worst case scenario is you'll be no closer to what you want than you are right now. I read a great ebook about a getting your ex back without coming on too strong. I wrote a review of the book on my site. I really liked it, and I think I provide a good description. When you get a minute, check out my review. You might find it helpful :-)
http://www.simplygetyourexback.com/category/catgetyourexback/

Sometimes Facebook and other online sites are break up gods. We need to be careful, but you need to tell her the truth how you feel and what happened.

I hate to tell you this, but is she doesn't listen to you it may be over or maybe in the future she will come back. never know.

You should have to do anything to impress her at all. If it's true love she will come back and give you another chance.

I can relate. I kicked a really nice girl to the side and got married to a she devil. I have not talked to the nice girl for about 3 yrs and I talked to her. She and I became friends and maybe we will date later on. She excepted I made a mistake and she realized I really do care about her. Now I did messed up, but I will never do it again. I kicked her to the side, because I thought she was kicking me. When I didn't understand her life.