Ok so, a few months ago I met a girl who seemed perfect to me, so perfect in fact that I broke up with my girlfriend of 1-2 years after only have spending 4-5 hours with her. We met by her mom and my mom being friends, and so we started talking more and getting really close. She then asked me to her prom, I agreed to go, it was seven days after my birthday. We started dating and were going steady for a few weeks, we were always at each others house. Then, after being at her house for 6-8 hours one day, it was getting late, we were laying on her bed watching abmovie with her little sister and suddenly my moms boyfriend comes in her room, tells me to get up we were leaving. So I said goodbye to her and left. On the car ride home I found that my mom had presumed her boyfriend and my girlfriends mom were having sex. So I was freaking out because my parents were not only splitting up but I may have finally found the perfect girl and it could all be gone. From here my mom said I could still date her and go to the prom but was to be no where near her mother. Well my girlfriend calls me and tells me she's breaking up with me because my mom doesn't like her, I expediciously got off the phone with her. Not five seconds later she called back, I ignored it not knowing this was a huge mistake. So I go down my stairs and tell my mom what had happened and she told me she was happy we broke up. So now being upset I left it alone. A few days later I find out that the second call was why she was really breaking up with me (because she didn't want to cause issues between my parentts) and a few days later on my birthday, I ask my mons boyfriend to take me to the mall and he said no, he had to go to work. Well later that night my mom went to get money from him and my ex's mom was there. So my parents split up. I get my brother waking me up at dour in the morning telling me when I get Home from school I have to pack up all my belongings and that I'm moving out. What a birthday gift huh? Anyway, I still miss her soooo much and want to just talk to her at least, but I feel I would be betraying my mother and brother by doing so. I think I love her, but I can't get to her, or talk to her, how should I go about this? What should I do? Please help me. :( thank you

I think that your young and don't need to worry about what is going on with the adults. That's between them. Be there for your mom the best that you can but remember that you're the child and she is the adult.
I take it from what you wrote that your between 16 - 18 yrs old. If you want to continue to date this girl, this should be your decision. I would find a way for you and her to sit down and talk. Let her know that you care about her and that the problems between your parents and hers, shouldn't come between the two of you. Make sure to listen to her and not make any bad comments towards her mother. Don't listen to her make bad comments towards yours. While neither of you may agree or disagree with what is going on with the adults, it is between them. They should not involve the two of you or your brother. Be more mature than what they are and make your own choices. Respect and listen to what your mother has to say but also listen to yourself and remember that it is your life.
I am speaking as a parent. As long as a boyfriend treats my daughter with respect then its my daughters choice. Same for my son with a girlfriend. I want both my children to make their own paths in this world and I wouldn't want to negatively affect that in any way.
I hope this will help you.

Thanks :)