Really confused

ok my girlfriend is away for the summer but we talk on the phone for like hours every day and I really like her maybe even love her but my ex girlfriend has decided to tell me that she still loves me and well I told her no but she kept on and then last night we were watching a movie at her house because I was staying over with her brother but one thing led to another and we were having a total make-out session and it escalated to the point of well "more intimate contact" and now I guess she thinks I like her again and now I dont know what to do cause I really like my girlfriend but my ex thinks we are back together and now I need some major help please someone tell me what I should do

OK, for starters you need to tel your ex that you are sorry that it happened and you wish it never happened and that things just got out of control. Tell her that you were thinking of your girlfriend at the time and not her(your ex). Explain it nicely and calmly, that you dont want to be with her at all. and tell your girlfriend, what happened (not in detail) tell her that your ex started it (just so you dont get most of the blame) and tell her how much she means to you and that you wish it was her so much more than your ex. this is from a chicks point of veiw. hope everything goes fine. if it doesnt time will tell, it may not take your girlfriend straight away to forgive you but it will make her realised that you are honest. and that counts a lot!!!!

first of all you should have never put urself in that situation. I kinda think you were wanting somthing to happen. you knew she liked you and you still went over that. that was the 1st prob. 2nd of all I think you need to tell your girlfriend. if you really love her you prob wouldnt have done that with your ex. I can understand hormones but still. keep your fingers crossed that your girlfriend will forgive u. good luck