Rule Six:
I have no doubt you are a popular fellow, with many opportunities to date other girls. This is fine with me as long as it is okay with my daughter. Otherwise, once you have gone out with my little girl, you will continue to date no one but her until she is finished with you.
The last thing any high-school-age kids should be doing is dating exclusively. No relationship at that age should be so serious that exclusivity is called for.
Haven't seen you on the site for a while. Hope things are going well.