Diz, it's OK, most of us have "got" the situation re your ex-mate.... but I can understand that it's left you feeling cast aside. However - that's just one bloke, there are more and better mates out there still to be found. You do need to try not to dwell (although I know from personal experience that it's easier said than done). Are you fit enough to volunteer for some physical work, that you can work out your frustration doing? - something like digging up an old person's garden (provided of course that they want it dug up!)