High school relationship problems

please, take the time to read this. i could really use anyones opinions, thanks. please read all of this, im in desperate need of someone to heloin the end of my elementary school years, i had to start deciding where i wanted to go to highschool. most of my friends went to the feeder school of my elementary, i decided to go to a private school in an opposite town. i was starting new, i knew no one and i was the only one out of my group of friends who decided to go. so i decided to make friends from the school which im currently a sophomore at. i met an amazing beautiful girl whos name i wont put.. but she is absolutely beautiful and everything about her is perfect to me. she has blonde hair, blue eyes and the cutest smile. we started talking and right away made a great bond. we just clicked. we started dating 3 months after we met and we dated for 6 months. during these six months, she cheated on me 3 times, and we argued all the time, and her parents learned to not like me at all. they thought i was horrible for her, no good, and just a terrible kid. im not a terrible kid, they just got the wrong impression and i never knew how to fix it. im a great quiet kid, always nice, and sort of shy when meeting new people. i never really met her parents except for our freshman year homecoming, which was last year. we barely talked,and i didnt say hey to her dad at all. her parents are divorced and she lives with her mom,so at the time she was never really around her dad. in december of 2011, her parents found out that we had sex. her mom called me and was telling me that i was to have no contact with her daughter, i couldnt talk to her at all. they left us not knowing when or if ever we would be back together. we were madly in love. for the past year, we have been secretly together. we cant be seen talking, we sneak out of our houses at night to see each other.during this past year, she has been living her life how she wants,partying, cheating on me, getting with other guys, and i never do any of that because i love her so much. nothing has changed with her parents, they still do not let us be together. what do i do?i want to spend the rest of my life with her in all honesty.i want to go to college with her. but because her parents dont let us be together, she does whatever she wants and i have a heavy heart and always forgive her. please someone tell me what i should do so that she will quit all of her stupid partying and any other advice you guys have. please no mean comments, if you have any bad thing to say just save it. thanks for the help

See i can really feel what you are goin thru,I had a similar tym once...with that experience i would advise you to better be strong & try diverting your mind in some other thing rather then getting hurt each day. When her parents do not want u guys to hang out or spend time together n if u guys were realyy serious abt each other,She would really hv been more cautious & responsible. Bt she too is acting strange n weirdly as u stated,n Moreover ur sacrifices,the small lil things that u are constantly doing for her isnt getting to her notice either!! so Boy,grow up n try to see the difference between love nn mere Timepass,She is clearly giving you signs that she is no more into u & u should get them & try to move your focus into something that will eventually work. I know what i said might sound harsh to you but trust me boy,Its way better than getting a heartbreak! do luck