High school students fret so much about getting into colleges and all that and it's really silly and in three years you will be like GOSH I WAS SO SILLY!!!! Like not to put you down man but seriously that is how it is.
You are doing everything right and have nothing to worry about. You will get accepted somewhere regardless of your grades. It is pretty rare to get rejected on basis of grades when you apply early. Exceptions are when you apply to a state college's main branch (the one that says like University of Ohio without a city name after it) or a private school. I would bet you get accepted to at least 4 of your picks.
Also
fill out a FAFSA right now jesus christ it is so sad how many people never apply for financial aid and then get screwed halfway through the term when they still haven't paid and get expelled or something. Make sure you go to the official site because there are lots of scammer sites out there that steal your information.
http://www.fafsa.ed.gov/I DO recommend going to a less expensive and more convenient school because college is college no matter what. It only matters if you go to a school that is actually famous (like Harvard). A degree from any state school says "University of Wisconsin" or "University of Ohio" on it regardless of what campus you go to and nobody in the real world will seriously give half a damn which branch you attended.
Also yes it is maybe a little presumptious to pick a college based on where your girlfriend is going and there is a realistic chance you will break up and you will regret your decision, but if it is important to you right now and you have made a decision, stick with it and be proud of yourself! If something matters to you, don't be ashamed. She is obviously very important to you (also it is always magical when high school sweethearts marry and the rest of us are always jealous).