What should i do about her?

Hey everyone, i have a question which has been plaguing me for a long time, and i thought i'd get it off my chest. Last year i stayed in Sweden with a friend and i met a girl, she is so sweet and funny, and i made sure we kept in contact, well, about a month ago, i admitted how much i liked her, and she admitted she liked me back, and im going over to stay with her for a week in 2 months time..the thing is, i love her, but in comparison to all these boys she goes to school with, i dont really know her a huge amount, and it kind of makes me feel guilty and worried, jelous..a whole list of things, for all i know she might fall for some bloke at school, and i cant do anything about it, i also feel like im intruding or something, i so badly wish i could see her regally, but thats not optional at the moment, and i see photo's of her with all her friends and i feel like i could cry..i dont know how to deal with it..any advice would be so appreciated, cheers.