Powers of Attraction

I've been thinking about this for a little bit: Every girl who has ever expressed interest in me... I have been baffled as to how it happened (except once.) It always seems like a fluke afterwards, like I stumbled ass-backwards into the situation. The trouble there comes from this connecting thought: How can I intentionally attract someone? If I have no idea what I did to attract these girls in my past, how can I hope to translate that into future success? Is it my complete obliviousness to when a girl likes me that is the attraction? If so, how is it possible to make that work for me?

The circles just keep winding around my brain.