*NEED ADVISE, long, but please read*

Dear Witty Girls Everywhere,

I Need help! ...At the beginning of the semester, a girl whom i thought was a good-friend of mine were talking. I was saying how much i loved this kid in our Geography class which we have together. She said "Yeah, I guess he's cute." Me and the kid I liked were talking on facebook. Just about anything, and i was starting to get the impression that maybe, just maybe, he was starting to like me too. So, I was happy as the days went on as we would have conversations at school and online. Happy, I walk into school heading for my friends locker ... when I see him at her locker. They were talking, so I kinda walked to my own locker before home room started. Later on in my Geography class i find out that he asked her to the dance. I couldn't believe it. She hadn't liked him a couple weeks ago! Throughout the rest of my Geo class i sat there, with failed attempts to keep all the tears back. It was horrible, both "my friend" and "him"  are in my geo class. She is also in my vocal class, and he is in my math. Two boys in my class kept turning around asking what was wrong. finally they started asking my best friend in that class, but not even she knew. I looked at the clock only to find i actually had another period before i could go home. Everyone seemed to notice my tears and sadness ... except him. On my way to my vocal class another girl in my vocals sees me aand hugs me while walking. I let most of the tears run out then. She brought me to a locker close to our next class so she could quickly get the story out of me. Once i finished telling her she said "That's not EVEN RIGHT!" aand we walked into our class just on time. Everyones eye's were on me, I was the centre of attention when for once in my life i didnt want to be. Our teacher was just talking to some students about stuff so it was pretty much free time for abit. My best guy friends ever pulled out a piece of paper aand started writing. After he was finished he held up the paper so i could see, it was a broken heart with a question mark beside it. I nodded aand tears started welling up even more. 
My friend, is now dating him. And she sees nothing wrong with any of it. she doesnt even care, nor does he clearly. And now I am left confused aand in need of advise. Please comment?