It helps if you don't give a forget. Sounds like stuffty advice but seriously, stop worrying about stuff and be yourself. Act as if they're your good friend because if you do, they'll become one. If shes making you feel uncomfortable for no reason then drop it. Really, just act natural. Doctor DDC (PHD) prescribes striking up a conversation or going into a conversation with a female in which you act normal, take about random stuff (like you do to your friends), laugh and smile. After you do that the first time, its always easier the second time. Eventually, you'll become a pro. Your issue won't be resolved if you have no experience.