Well, with Vday coming up, buy something cute, you know a bear of some sort and go to her front door. Get on one knee and ask for her to be your gf again.
To break it up, drive her home from a date, dont pull in the driveway and let her out at the beginning of the driveway. When she gets out, open up the window and yell that it is over forever, floor the car before she can get any words out. I call this manuver the drop end run.
*The DROP END RUN is a patent manuver only for the use of GruesomeBODY. All people wanting to try this must send him a message or he can sue.
Picture the scene, someone walks up to your gf one lunch time, whilst she's eating at the table with her mates.
"Dar_Win told Jesse, to tell Alex, to tell Frank, to tell John, to tell Helen, to ask George to tell me to inform you that you're dumped." When she turns around to look at you across the room, give her a big grin and wave.