@Bluebreeze , I am at a similar stage to you . My marriage broke down to infidelity on ex's part and contact has been difficult .
I think whilst some of us are in similar situations , I do think a lot of people posting here have been impacted by infidelity , which doesn't seem to be the case for your relationship breakdown .
But a lot of the emotions that you are experiencing are exactly the same , as your relationship broke down because of the your ex's poor behaviour and was not amicable . It was still not the situation where you have a deep conversation about how to fix the relationship at an earlier stage , whether that involved splitting or not - but most importantly putting the children first .
I do think and this is borne out by tons of research that for your children's self esteem and sense of worth , that it is better for them to maintain healthy loving relationships with both parents . That will obviously not apply , when there are abusive situations .
So I do think you have to accept and encourage these relationships for your children . It may be that currently they have perhaps similar interests to your ex and you can feel a bit left out & that to this extent they favour your ex . As they grow and mature your children will hopefully fully appreciate the stability and love that you provided them both when you and your ex were together and after .They can also make their own choices in the future when grown , about how much time they want to spend with your ex . You and I and a lot of others are also the parent who is left with the bulk of the day to day childcare and therefore won't always have the energy / time to be a " fun " parent . I note that your ex is sharing the holidays , so I would try and use that time to recharge .
I do think if we stand in the way ( I am not saying you are ) of this relationship between your ex and the kids , the kids may well resent and blame you and you almost strengthen their bond .
That is not to say that it is easy , but I think you and I and others have to accept that though this is not what we would have chosen for our children , that is now our reality and we need to get on with it .
Have you had any counselling ? I had some sessions which greatly helped me , but to be honest if finances permitted I would probably benefit from more . I also think that sleeping / getting fresh air also impacts on my mental health too .
It can take several years to get over a non amicable relationship breakdown , especially with children involved . There are ups and downs along the way , we make some progress then something else happens and it feels like we are back at square one .
I think it is difficult when we compare ourselves to others . I totally empathise with this , it seems like everyone else is coupled up and playing happy families . At various times e. g Christmas it feels like this is shoved down our throats . But you know that not all these families will be happy all of the time or even most of the time . I know that for myself , I didn't confide in others about the state of my marriage and I have subsequently spoken to others who are also struggling with poor behaviour on the part of their current partner / spouse .
You and I and many others either had to make the "choice " or other people where the choice was taken for them - to end the relationship . For those that chose , we didn't just do so on a whim - we did so because it was intolerable / unbearable to continue to be in the relationship . It would also not be healthy for our kids to continue to live in that family environment .
I do think keeping busy and being more sociable are good distractions for us all . I have tried to be more sociable and have made myself get out more . I still do not have a strong and geographically close support network .
But even so , I am still alone with my thoughts a lot of the time and will dwell on the separation / worries for me & my children more than is healthy . I am considering contacting my Gp re anti depressants for this . I have always been resistant to this until now . Although I know my issues are to do with my " situation " I have spoken to someone about this where when her spouse was experiencing dwelling unhealthily on one issue ( work not separation ) that they helped . I do appreciate that there may well be other side effects that will outweigh this benefit .
I also do not want to be that person who is stuck at this stage and continues to be bitter and twisted about the relationship breakdown for ever . I read on here , another thread ? about someone meeting a woman who was still fixated and dwelling on a relationship breakdown . She was shocked to discover that the breakdown had happened decades before .
I do not want to give my ex the power to impact my future happiness as well .