Feeling depressed over a date I had a few nights ago. Advice?

Alright first off let me thank you for taking your time to read my rant, and I apologize because I'm sure there are 100's of these things on Yahoo Answers all the time. I'll try and make it quick, but warning you this might be a long post.

I am a male currently 19 years old. In high school I only had 1 girlfriend in my sophomore year. That lasted 6 months, and during my junior and senior year I chased 1 specific girl, and it ended in denial. I got the excuse "I don't want a relationship right now." 2 days later she was with somebody. I'm still sore about it but it is what it is.

I'm now in the Air Force stationed in Maryland. About 600 miles from my home. I have always felt alone for the past few years, but the past few months have been getting very tough. Its really getting to me the fact that I go to sleep every night in a room with just me, and nobody is next to me. I don't have anybody here to share a connection with. The fact that there is nobody in a 500 mile radius that cares about me really bums me out. I've been doing the exact routine for months now. Wake up, work, gym, shower, eat, then sleep. I just feel very lonely. There isn't many people on my base due to it being a small base. I don't really have any friends here, the ones I due work the opposite shift of me so I never see them.

Well a new girl got here about a month ago, and we had talk briefly at lunch and I asked her if she wanted to go out sometime. She accepted and we exchanged numbers. At first she thought we were going to have a group dinner for her birthday, but I asked her if she wanted to hang out just her and I. She accepted, and we agreed on the following day. She had to go to Washington D.C, but she said she would go out afterwards. The next day she texts me asking if I want to go to DC with her, because she has to check something for her father. I go with her, and while we are out we stop and get food. We made great conversation, and had a good time. At dinner however she did say she was not looking for a relationship. The way she said it though didn't sound like she was trying to make it stand out, because she said it in a string of sentences. She tried to pay for the meal, but I slid my card under the reciept and I paid. We were driving back to base, and I mentioned some activitys that I like to do such as bowling, and frisbee golf, and she asked if I would let her know next time I go. We then said our goodbyes, and she thanked me for the good time.

A few hours go by and I get a chat notification on Facebook with her once again thanking me for the day, and I said I was wanting a slurpee from 7/11, and she ended up going with me, and I paid for those as well, but she insisted she should pay. Anyways, its been 3 days and I didn't want to make it sound like I was to open so I have been waiting to see if she would contact me on Facebook, text, or call. So far nothing. I saw her on Facebook for a few hours last night, but never got a message. What should I do?

I keep telling myself that her statement "I don't want a relationship right now" that it could change, but I think its because I don't want to accept it. I feel like after that denial from the girl before I can't do it again. I realize this post made no sense, but its more of a rant. I appreciate any help. Thanks in advance.