Don't seem too eager or this might scare her off.
I know how you feel, TRUST ME, but if you come off too into her she might get scared. I know I do if a guy emails me or calls me too quickly because then they seem needy.
I know how good it feels to not be able to get someone off your mind. It is a rush, but don't get carried away.
If you went out with her on Friday, call her like on Sunday to tell her that you had a good time and to see if she would like to get together sometime soon.
The flowers might seem like a good idea BUT DON'T DO IT! If you really want to give her flowers then wait until your next date and present them to her then. DON'T GET ROSES! THAT SCREAMS YOU ARE PSYCHO (not saying that you are). Just a nice small bouquet...