I would like as much help as possible from girls 18-25 please? Anyone's input is more than welcome.?

Well I am having a difficult time with girls. I have never had a girlfriend mostly because I was afraid. I didn't want to disappoint her any. I am over that now and I really want a girlfriend, but I can't even get a date. I have asked several girls out, but they all say I am not their type. I just want a chance. I really don't know what I am doing. I get real embarred when other lady's bring up the subject if I have a girlfriend yet. I am also easy to blush if I like a girl. It is hard for me to go clubbing because I am in the Air Force - also could be why some turned me down instantly. I am a real cowboy, I don't dress like a slouch and I am rarely seen without my cowboy hat. I have not been wearing that as much because a friend advised me that could turn some girls away. I love doing anything outside-especially riding horses. I am very friendly, I get a little nervous though when I first talk to a girl I don't know kind of embarring when it gets hard for me to talk and I stumble over words. It is tough when you don't have much experience with girls at all. I am 20 and have only kissed two times-that was this year. She kissed me first and asked me to kiss her-which I did, but I got a little light headed-wow that was good. :) Turns out the girl had a boyfriend I didn't know about and that hurt me. She had such pretty eyes, I know I do like to kiss, I really want something like that again...without the other boyfriend. Not that I am worried about him because I am a big dude. He is just a little boy. She was so pretty. This is no joke, I would like some help. I deploy this summer to Iraq and still have never gone on a date with a girl. I feel like a real looser. How could it be so hard for me to attract girls? Could I better my chances without changing who I am? Please give me some good and real help yall. Thank you!!!