it works best the other way around.
take up hobbies, be social, try something new, etc.. basically, get out there and don't rely on the computer to do the legwork for you. don't chase after every girl you meet, as it comes off weird and its not really the point. the point is to make some new friends and expand your social circle. if this means going to bars and having the occasional drink, do it even if you don't like it -- doesn't have to be a regular thing. eventually you will run into someone that peaks your interest. take your time, gauge the person, and then act.
or at least, thats my $0.02.