it's not you, it's me

ok so i'm starting to get super bummed. this has happened way too many times...i'm talking to a guy and we hit it off really well, talking all the time, he seems really into me, he's seen pictures of me and calls me beautiful...we meet in person and then it's like....done. Not like I think it's my looks [cause they've seen my pictures, so if they didnt like the way i looked they would have been turned off a while ago, right?] but i dont know what i'm doing wrong. am i overweight? am i not pretty? like seriously what the hell is wrong with me? i know i just got out of college and i dont need to be in a relationship right now but i'm getting so lonely around here....i feel like i need someone to talk to. i have tons of friends but not many in this town. and its weird cause i've lived here my whole life, but all of my friends from home have moved on and elsewhere. i just want to meet a nice guy. one that's decent looking, i dont care if they're drop dead gorgeous. i want a southern gentleman, someone who is genuine and still chivalrous. i want someone to be my best friend and my lover. it doesnt seem like a whole lot to ask for, but the guys i  meet seem great and then they just fall off the face of the earth. did they meet someone else? is there something all of a sudden wrong with me? if it had only happened once, maybe twice, i would just brush this off. but it's been way more than that. so obviously i'm doing something wrong, it's got to be me.