[header] How to get a nerd to like you [title] Ask around. [step] Find out what you can about your crush (without being a stalker). Ask your friends for any information, such as whether they're available, what their interests are, their age, and so on. 
It's always best to have at least a little bit of information about your crush before approaching them. [substeps] Having some background information will be helpful as you'll then have some conversation starters as well as an idea of whether or not you two would be compatible in a relationship.