First of all, I am a girl, so i can help you.
First, take it easy. Don't be too oppresive or flirty. Just act how you are. If you act too flirtatious and wanting to win her love, she will resist you. Just stay as friends as first. Then give her some time by herself sometimes. After a few weeks, you can try spending time with her. walk her home sometimes. You can try wikihow.com for more tips.