Am i just meant to be lonely my entire life?

i just have no luck with guys it seems. i've had 3 boyfriends, but two of them went out with me on dares and the other one was when i was really young. people tell me that i'm really pretty and i'm not fat or ugly or anything like that! i'm short, dark blonde hair, blue eyes, skinny, easygoing, everything! not to sound really conceited or anything but i don't cause drama like a lot of girls i know and i'm not a jerk to people like they are. yet they get tons of guys! i don't understand! what am i doing wrong?? people tell me that i flirt well and have a cool personality and everything. so it seems like i have the whole package right? so then why won't any guys like me? i'm so tired of being lonely and being the 3rd wheel all the time. i can include a pic if you guys want. i just don't know what to do anymore i've tried everything and these guys just seem to not even consider me as girlfriend material. how do i get them to think about me as more than a friend?!? thanks in advance =/