Should I be offended? She cropped me out of the picture!?

[why]

I went to homecoming with a few people I'm kinda friends with...we're nice to each other....but I mostly know this one girl "a". Me and "a" have a lot of classes together but we never really talk...maybe like once or twice...even though i'm kinda socially awkward she was nice to me, she's kinda shy herself but i like that she's so nice and not judgmental or rude at all like most other pretty girls...But the other day i asked if she was going to homecoming and she said she was so i asked if i could go with her and tag along since i dont really have that many friends...she was hesitant and was like "umm...yeah okay." then she gave me her number and when i got to homecoming i texted her and she told me to meet her at some table...then there she was with all her friends...

So I went with her and her friends...but i had other friends their too and i would go back and forth from people to people that I know,,,I didn't just stay with one group...

Well when I was with "a" and her friends...the entire time i was quiet, playing with my nails or my phone, i didn't talk to anyone...and 'a' is pretty reserved and shy so she didn't say anything to me except hi when i got there...some teacher person told us we should take a group picture because everyone looked so nice. So everyone got up and i just joined them even though i felt annoying since i'm not even good friends with any of them but i do KNOW them, i've talked to several of them before...i stood beside "a"...

then today i went on facebook and i see that she posted the picture and put "with my girls ♥" but i was cropped out of it...

should i be offended? or am i being too sensitive...we're not even really friends but i still feel sad...
and i feel like they don't really like me anyways...people tell me i'n really awkward and annoying, too insecure and weird...

i talk a lot because im always nervous, i never know if people are annoyed or tired of me, so i just keep talking since people dont like quiet people...but no one likes me even though im really nice, i always compliment people, say hi to everyone i know in the halls evenif i hardly know them but people think im weird and a loser

btw im a senior in hs
and she doesn't know that i have a facebook...i made a fake account so that i could see people's pages and i added her...then i saw that picture
she did introduce me to everyone and they all said hi because they recognized me

[Momenul]

Facebook is a website which gives us sadness and pleasure............ But nothing more that...
So dont be depressed its fully ok

[Zswaggerfan405 fan]

no. sometime's fb mayes you do that. i should know http://answers.yahoo.com/question/index?...616AA82TRp

[Lily]

No. You said it yourself, youre not good freinds. I can understand why you'd be upset but dont be. Its a really small thing to get so sad about! X

[Sydney]

AWW i feel sad ;(
anyways facebook is just a website
nothing more if she wants to be
fake so then let her, I bet didnt even
introduce you to her friend ughh
But i don't think you should get
mad over a cropped photo. I know
it hurt but its just a thing.