When I'm with her, as a friend, your friend's date of birth should be asked whether it is a day where I know I have a friend who was born the same day as me. I'm glad you like the most and have this friend.
When I'm with her friends. I should ask my friend's birthday that day. Then I knew I had a friend who was born the same day as me. I'm glad to have a friend like this.
When you and I are friends? Should ask the friend's birthday that I was born. I know I have friends, born on the same day with me. I am glad to have this friend, and the like.