Since you are good friends, you should sit down and talk about it with her.
Friendship can be a good start for a relationship.
She may not feel the same way about you, and if that is the case, you should be ready to leave it alone. Even if she is interested it would be wise to take things slow, because the idea could be startling to her. There are things that you can do to test the water. If so that can help you to test the waters and to ease the transitions. Meet people and get to know them in your own time .