Most Helpful Girl
you don't miss her. you miss the idea of intimacy of a familiar person. go ahead tell her but do not lead her on if it's only sex you want.
Most Helpful Guy
You're saying that you only miss sex with your ex?
Do you miss anything else about her? If not then leave it alone bruv..
If you actually CARE about the girl, then you can attempt to get her back.
Not sure what the terms of the breakup were.