Feeling left out from my g/f?

For some time now I've been feeling that my g/f is trying to push away from me, and I have no idea why that is! Now I've realized that in the past 4 weeks she's been busy with plans that she already tolled me ahead of time, ok no problem there, I guess the thing is that 's bugging me about that is it seems that she never has time for us. I'm always free to go see her during the weekends and most of the time she is as well, well about 3 weeks ago one of her girlfriends got into a very large fight with her b/f right, well being that in tell she can find her own place I was tolled that I can't come over being that I might scare her after what she's been threw. Well last week being that I've asked her if there any possibility that you could come down and see me being that she did during that time being that I couldn't she would just come see me. Well that Saturday I just wanted to make sure that it's still a go, and she tolled me that she was coming down on that Sunday, ok great I was very happy there. Well once Sunday came around I guess there was some family get together that she knew about but I guess nothing was going to happen in tell later on that, well right when she was about to leave and head up my way I call and it turns out that she had to stay being that she was wanted by her mother. Well after I found out about that she asked that if I was mad being that she had to drop that, and I tolled her yes I was. I've been having this odd feeling that things aren't going the way they should be, I don't know, I guess it's all because I haven't seen her in 4 weeks, or that she's always busy, but she hardly ever was when we first got together and ever since then in tell 4 weeks ago. I don't know I guess you can call me paranoid or whatever I just want to know if were ever going to have are own time together. And I should mention that she was a virgin and she trust me with all her heart, so why is it that I'm feeling that I can't trust her even tho she always tolled me that I could never be with anyone else for the rest of my life? Wouldn't you think that being that she has very strong feeling for me being that I was her first that wouldn't you want to spend as much time with that person that you love? I would think so. So being that I wrote you my little crises that I've been having what can you tell me what is the best possible outcome this might have after everything is settled, or I guess your point of view on it.