If you have trouble talking to girls you are attractive to, try talking to some you arnt really attracted to or ones that are like taken for practice. Then move up. Ask questions about them or comment on things they had control over, like their shoes, or how they dressed. Show your are really listening to them. Like is she's telling you about a bad day at work and says "my boss is such a creap", repeate it back to her "oh really your boss is a creep"? And of course make em laugh. Best off triing not to get in their pants and well it will be easier to get in.