What should I do about my ex girlfriend?

We were togethere for two years we had broke up once in the two years for about two in a half months. We could not resist to get back together. We loved one another. At least I thought so. When we got back together after the break-up two days after exactly she was forced to move in with me because her parents did not approve of her dating me. Thats another story. Anyway, she lived with me for three months and we found ourselves arguing a lot again. Over a guy who kept texting her. She has never cheated on any guy or me. That I know of. She is a pretty committed person. I didnt understand why she was being kinda sneeky about the texting thing though if it was just a friend. Anyway I beleive he was just a friend but a month after our split she was in a relationship with a different guy. So im left here questioning myself did she really love me? How could she move on so fast if she did? Does she think of me or even maybe want me back? Its been seven moths since the split and I still love her and think about her just as much as I did when we first got together. What should I do? and how does she feel? She recently talked to my mother about how she doesnt love the guy she is with and asked how I was doing? She talked to my sister and a couple of my friends and they all told her to admit that she was still in love with me and she told them all she couldnt talk about it. She texted me in a drunken stuper once and we talked for awhile. What does this mean?