We haven't talked in 2 years,should I add her on facebook?

Ok I met this girl on holidays 2 years ago and I became completely in love with her,well I think it was love anyways but she had a bf at the time so i didn't want to mess up our friendship,so I told her how I felt on bebo(old social network) after she went home from holidays and she told me that she felt the same and that I should have told her before.Anyways we talked on that for a while then I moved on with my life,but I still think about her sometimes rarely not often anymore.Anyways I was just thinking about the holidays the last day and remember her so I looked her up on facebook and found her page but didn't add her.So any advice on whether I should add her or not its been 2 years and she might have forgotten me and might think Im a weirdo adding her after that time?Any advice what I should do or say if I add her?