When is enough, enough?

So I had an interesting night last night...started out at the office where we had a charity auction for United Way. Got myself an iPad for $300 woo hoo to me! Anyways I don't exactly HAVE $300 but I did some fancy money moving and cash advances and managed to scrape together enough...I mean a deal is a deal right? Anyways so my friend/coworker and I stuck around and had some beverages and when everyone else cleared out I texted this guy I used to see...I will call him M.

A complicated situation there because I broke up with my boyfriend of 3 years to date this guy and then pretty much immediately he stopped speaking to me because an ex of mine from 10 years ago decided that he couldn't bear to see me happy if it wasn't with him. So then and the ex cut me from his life and asked M (who I suppose was his friend first) to do the same. M, not wanting any drama in his life seemed to agree but told me it was just because he was working up North and didn't have time for a girlfriend...whatever. So I was lost at the time.

I went and texted him last night which I know was not a good idea because, despite his attempts to keep his distance, when we do actually get together, we don't behave like adults who are "just friends" if you catch my drift. So we met he and his friends at this club...seems we were the oldest ones there. One of those clubs where trying to dance on the dance floor is apparently an invitation for molestations from sleazy 24 year olds. Anyways I took off with M after the bar and we went to his place, had some wine and then well....we didn't behave ourselves at all for the following 4 hours and then we just sort of lay there and talked for 3 hours before I left to catch the train home. Now, despite 3 texts with specific questions, he seems to be ignoring me until next time he needs to be fucked for 4 hours I guess. Do all single girls have a weakness like this? A guy we want to be more than friends with but because they don't seem receptive to that idea we settle for a fuck buddy at their beck and call? It is not as if I have any hope that this will work out, I just can't seem to let go of the guy he was in March when I first met him. We had the all time best first date that wasn't a date. Is there any way to finally get this guy out of my head? When is enough, enough? It is killing me but I have been down this road before and it never ends well. So what is the trick to letting go?