I got this girl's number at the end the class(like very end, no more classes). And well, I obviously wanna call her up to do something. I've got some ideas in mind on what to do, but I'm nervious about calling her. I'm not quiet sure how to introduce myself and all. We barely know each other and I'm surprised she even gave me the number(when she did, she watched me put it in my phone. weird at first, but figure she wanted me to get it right, or totally wrong). Every other time I've known the girl I was calling, but this time I dont. Any good ways to approach this? Thanks.