I have 2 children with my ex partner of 11 years. We broke up over 9 months ago and I have since moved on, because I moved on quicker than even I expected he has it in his head that I cheated which is obviously false. He has not seen the children since the first week of June and one had 2 phone calls to them since. I have taken my children on holiday and alerted him a couple days before due to it being a last minute thing.
He replied only with a sarcastic comment about me previously saying last minute was a bad idea, no objections at all to the holiday itself. Since being away I've had text messages threatening to mess with my holiday claiming I did not get his permission and pardon his language but he "could really f* with me right now". We are only away for 4 nights and it's not the first time he's made a threat to mess with me or tell me that he's going to turn the kids against me.
I have kept all lines of contact open for him and he has chosen not to make contact or when I ask him to he says this is all my fault because I didn't want to be with him anymore.
I'm honestly at the end of my tether and I really don't want to go to a solicitor but I can't have him controlling me like he did for 11 years when I just wanto move on.
Please, I need some advice