Okay guys heres the deal.
Ever since january I've been really good friends with a girl. We REALLY hit it off.

I'm training for a military/ Law Enforcement career. And she has been doing ballet since she was 3. She was looking to tone up for her upcoming performance. I took her rockclimbing, to the gym and cycling classes, walking the dogs, hiking, running, biking, always something new, exciting, and different. We really started to fall for each other, well at least I fell for her. She ended up losing about 10 pounds of fat, and looks AMAZING. We would hang out maybe 3 days a week, and usually we spent friday nights with eachother at someones house wathcing a movie or some sort of romantic activity. We both met, and get along with, each others parents. And it seemed like she really liked me. I got along with her friends well, and we went to a few concerts and events together. There was just one thing holding us back from a relationship, her ex. She is still attached (she claims its love, but she is just attached/lust) to a guy she dated about a year ago. I've asked her, and she said they don't have a sexual relationship anymore, and are just friends, but she still "loves" him. well I told her i was the type of guy willing to wait for the right girl, which i am. I thought she was the right girl. We talked about summer coming up, and how much we'd see eachother, and all the things we'd do (like hanging out, get your minds out of the gutters

). We even planned a possible vacation to Europe when we graduate next year. I even sat through her ballet performance AND bought her her favorite flowers which made her cry.
Well she is a pretty popular girl, well at least has ALOT of friends, so I knew she would be busy this summer. All of our friends told me that she and I were going to hang out alot and I was planning to ask her out sometime soon. It has been one week of summer, and it seems as if she doesn't even want to be my friend anymore..... I try to call her and make plans but its always "lets just play it by ear". She's always SUPER busy, and always out with someone. Its not a bad thing, its just that it seems she's unwilling to make plans with me. She keeps bailing last minute on the plans we do make, like when she says she's going to come to spinning class (which i go to cuz she likes it), but then last second she cancels... And Whats worse now is that I'll try to make plans on a day i know she is free and it's always "well i have no plans. I'll do something with you if im not doing something with somebody else. my life is an open book". It seems like i've become a "backup plan" for when she's bored or has no one else.... It bugs because we both got along SOO well. We both are alike in so many ways, and she is exactly the type of girl I can see myself marrying...
I don't think I've done anything wrong. I'm just being the sweet me. I bought her flowers, got on her parents good side. got along with her friends. always paid for everything. always let her have the final say. always made sure she was comfortable and everything was ok. She knows I'm always here for her, and I've been there to comfort her when she was feeling really depressed and down. I;ve talked to my friend and they have no clue what happend. She got along really well with all my friends too. Everyone honestly thought we were going to be the big couple of this year....
I want your guy's help/opinion/anything will help at this time. I'm a military brat, i don't usually share an opinion, especially on feelings. But with this it's different. She is/was really special to me and I really have no clue what happened...