i'm big and have had boyfriends, but I don't feel comfortable around guys anymore since I gained weight. some girls like skinny guys, it depends how he looks overall. also it depends how skinny the guy is and how heavy the girl is. there are limits lol
I actually find skinny guys more attractive in general than stockier guys (and my friend does too). When they have muscle too, it shows way more. I'm not a big large muscle fan, but it's not a bad thing either :) Don't worry about it, you're fine!
Hit on thin girls. Some of them like big guys, but some of them like lean guys.
Also, take up boxing. Your height at bantamweight is awesome (and not unheard of in pro ranks). Its being wasted right now ;)
Aside from the fact its fun and you have a natural advantage, it would change how you think of yourself. You think of yourself as 'too thin'. If you were using your frame to your advantage - as a fighter no less - you'd just start seeing yourself as lean and strong.
I'm not quite as thin as you, but I'm pretty thin and 6'3. I'm not skinny, most other guys are fat and I'm a f*cking rapier.
Most guys around you would be your weight if you ripped the fat on them. Slapping a beer belly on you would not, actually, make you a sex machine. Though it might make fat girls feel less self conscious. So ... hit on thin girls.