I really don't know what to do when she says "I want to be single"
Give her exactly that then. Let her have a taste of that life she thinks is so great. Seems like a crap-shoot, yes, but as the saying goes, if you love something, set it free, it it loves you, it will come back. Then you know.
Me 35/XW 33 S13 & S12 M: 10/17/98 OM & S: 07/08 D final 06/09/09 12/03/09 - 06/13/10 "Piercing" 06/13/10: Engaged to Re-marry 10/17/10 06/25/10: Expecting baby #3 2/14/11