I've had a class with this girl and we used to talk on the phone and stuff and she told me she liked me but we never did anything anyways so we havent talked in a while and she sends me an IM on FB and she was really joyfull and she said she missed me and what not, then she asked if i had missed her..

This is what i said:
Well i DO miss having you for a class, you were always so loud ;P!

But before i answered i kinda struggled because i didnt know what to say, i thought if i told her i missed her too i thought that would be predictable, but she said she missed me so i didnt wanna be too much of a dick and tell her that i didnt miss her lol, so i made a mix of those thoughts and said i missed her PRESENSE in the class, but i didnt admit to missing HER ... oh! and she has a boyfriend now >.>

What alternatives could i have gone with? Im confident in what i said was okay, but id like to know different ways to handle the same situation.

boyfriend isnt a wall... should of told her

yeah i kinda miss you, matter fact lets hang out tonight im gonna surprise you ill pick u up at 8 i gotta tell you some (insert something here ie:gossip or whatever)

if she says no i got a boyfriend then ask her if he wants to come to

cus shes got a boyfriend, i would of took the piss and said;
'yeahh ive been missing you so much, ur always on my mind, infact every single night ive been crying rivers because ur not making my class to make it lively no more with your big mouth :'('
and if u want u could take it further and make it more sarcastic...shed find that funny and have ago at u for taking the piss
then u say what the guy above just said in a serious way

Something I've wanted to try, but haven't got a chance to yet:

"I don't really miss anything. I just enjoy everything that comes along while it lasts."

(because it's the truth for me)