You arent my ex are you?? Although I am no engaged you sound so much like he was. Me and him were on and off for about 10 years, he just wouldnt evere commit. So in the end I thought I deserved more and cut off all ties. I got with my bloke and my ex followed me, txt me, etc said he'd changed wanted to make a go of things. Now 3 years on I'm still with my bloke. My ex is living with his pregnant girlfriend and still sleeping around. He was never going to change. he just didnt like me being happy. I think this is the thing with you, you wouldnt commit 'it was just sex' and now she is settled you arent jelous of she has someone else, you dont want her at all, you just dont want someone having a better life with her and the one you couldnt give her.