Me and me so

How do you approach someone you don't know. I've become so carefree and spontaneous but I still can't approach a girl I don't know to ask her out. I've stopped thinking about other things, but when it comes to approaching women I over think everything. A beautiul blue eyed, brown haired girl has caught my interest, but she's just another girl in class, how do approach a girl without any previous contact. Well, besides the sex. She was the first person I had sex with today in class, which meant she came and linked arms with me and I made jokes and she smiled and laughed. Psychology's fun. Ah whatever, I'll just try and sit beside her next class.