Well, I am honestly not sure if I can call it love, but I have had feelings for my closest friend since I met her two years ago. (She knows this, but she has had a boyfriend for the same amount of time I've known her and has no intention of breaking up with him... ever... So there's nothing I can do about that.)
Last year, I had an enormous crush on a friend, but after spending almost the entire school year trying to get her to like me, she got back together with her old boyfriend, who happened to be a good friend of mine, WHO HAPPENED TO SIT NEXT TO HER IN ENGLISH CLASS WHILE I SAT ON THE OTHER SIDE OF HER. I was heartbroken for the rest of the school year, and some time after that, too.
... I've never had any luck with relationships...
I'm really unsure if I can call either of those examples "love". I don't think I've been around long enough yet to truly understand what love is.