Long Distance Lesbian Relationships?

so i’m 19 and am in my second long distance relationship with a girl. the first one lasted over a year and she moved in with me about 7 months into it. at the end i realized our relationship wasn’t healthy. i felt like she was my child because even though she is 2 years older than me, she didn’t have a good head on her shoulders and was completely unstable. she didn’t make me happy at all. so we ended it. a few months later, when i least expected it, i met a girl at the college i go to. turns out she was from england and only here for a semester abroad. we spent a month together. at first we were just friends and flirted a lot. but then we took it a bit further, not realizing it would turn into something. we had sex about 6 times in that entire month, but i didn’t mind that it wasn’t very often and neither did she. we just loved spending time together. she went to san francisco, and i ended up buying a $600 ticket to go with her. on that trip we realized we were completely in love. and she had to go back to england a week later. she left on may 17th. but came back on july 1st. and spent an entire month with me and left on tuesday. this past month has been the best month of my life. she makes me so happy and the love we have for each other feels so different than any other love we’ve had for anyone else. the sex is amazing. we just click so well, and we’re completely comfortable together. i love every second we spend together even when she annoys the hell out of me, but it’s the kind of annoying that i love. i love her even when she bugs me (which isn’t often, fyi). i can’t explain it. she’s been gone for a day and a half and i miss her more than words can describe. i just feel like something is missing. as far as i know the next time i can see her is in december. i want to spend a month in england over my break between semesters. we’ve been dating for 3 months as of today. i don’t want this to end because of the distance and it’s not that i think it will, it’s just i’m so scared it will effect the way we feel. she has plans to move to the US either in feb or may… depending on if she’s going back to university in england. any suggestions on how to make this easier? we talk as much as possible.. esp on skype and i have calling cards, etc. i just don’t think any amount of skype conversations are going to make me miss her any less… on another note does anyone have advice on how to get her in the country legally and stay here? one of her best guy friends here said he’d marry her. i know it’s illegal, but idk what else she can do. the work permit thing seems ridiculously hard.. plus it seems like you have to have some “special skills that the US is in demand for” in order to apply for one. i wish i could pack my life up and move to england with her sometimes, but i can’t… i’ve got 3 years left of school. =/ any advice or anything would be appreciated. thank you!
ps: sorry this is a novel. you should get an award if you read all this, let alone if you answer.. =]