I am a 5'10, fairly attractive guy with a naturally outgoing personality. I have also been told I smile a lot. I have a good sense of humor so I can usually be seen laughing or smiling no matter where I'm at. from what i have just described, on paper it seems i would be pulling a fair amount of ladies but i have not for whatever reason. To me it seems that girls just brush me off or instantly put me in the friend zone or write me off as not their type. What am I missing?

edit: I think my problem is I just worry too much about being a nice guy. Thats been my reputation in high school and in college im the guy who stays behind to take care of a drunk friend instead of going out. I probably dont speak my mind as much as i should. I know that girls have absolutely no attraction to a nice guy, but as soon as i meet a girl im interested in, i just start being nice instead of making advances on her.