I've never had a close relationship with my "D"F. He left when I was 2 years old and breezed in and out of my life though out my childhood. Recently what was left of our relationship deteriorated even more when he admitted he's never really been interested in me and resented being my parent. Although deep down I think I knew this anyway, being told it was still very painful. Made even more painful by the fact that he has always been a brilliant father to my half brother and is always gushing about how proud he is to be his dad.
I decided a few months ago, for self preservation I would have nothing more to do with him. He's made his feelings clear and seeing him or hearing from him hurts, not that that happens very often anyway. Soon after me and my dp got engaged and will be getting married early next year. I don't want him there for obvious reasons but my DM thinks I should at the very least let him know I'm getting married. I'm not trying to hurt him by not inviting him, I just don't want to know him. I feel if I tell him I'm opening up the lines of communication once again and basically just inviting him to do more damage. I also suspect if I do tell him he'll accuse me of stealing my brother's thunder as he is also getting married next year. So, would I be unreasonable to just not tell him and never speak to him again?