There is too much thinking going on here. This usually works: go up to girl, talk to girl, repeat. If you think to yourself "I need to show confidence", you are not confident and there's no need to pretend that you are. Plenty of girls are just as attracted to awkwardness. Rather than introducing yourself as some GQ character, be a real person instead. Too many guys are obsessed with "confidence" which is usually defined as being a dick. These guys tend to measure their self-worth by whether or not the hot girl likes them, so scoring is a big deal. Stop thinking: go up to girl, talk to girl, repeat.