Most Helpful Guy
Well are most of these guys expressing interest in you doing so because they know you from work? The vast majority of guys who approach in bars are assholes who only want sex, that goes for approaching patrons and staff as well. How can you be girlfriend material, a good start is get away from the bar guys who approach literally every woman trying to get in her pants. Try your circle of friends, if they don't know any quality guys, try online. Not so much match or those other sites try meetup, it is a social site, not a dating site. Simply meet new people men and women (remember women have friends co-workers, bothers and cousins) other than the typical bar clientele.
It can be hard, just remember, "Everyday I'm hustlin, hustlin!"
Most Helpful Girl
Where do you usually meet guys?
If it's at your job, maybe your job environment is attracting the wrong type of guys and you should try meeting guys at different places.