Ok, so we can feel for you when you got stuck at a point where you don’t know what else to say and at the same time you want to leave a good impression on her.
What to do in this situation?
Best answer is “SHARE SOME GREAT MEMORIES” with her.
Sometimes the best way to make the other person feel comfortable is by sharing memories which you feel are appropriate and best. The other person will also feel connected as you are sharing something PERSONAL with her. So go on and share something which you always cherish.