Can't get a girlfriend

For some reason I am always single. in my life I have had only one girlfriend but, obviously that is no longer the case. I am a pretty attractive man, very intelligent, and socially gifted, ladies flirt with me and I flirt back, but at the end of the day I'm still alone. I don't know what I hope to gain by posting here, but I just needed to vent. any advice on the subject?

ask someone out

its not really about looks, there has to be some attraction there but mostly its peoples attitudes. just be nice and smile (but not creepy like) give off good vibes and just be a fun exciting person to be around. dont do that "leave them wanting more crap" crap it makes women think you dont like them. just be upbeat it will get you a long way.