Tips for playing happy families prior to separation

[FreshStart12345]

My marriage has come to an end. Neither of us has said it out loud yet, but we've tried counselling, we're not happy, we've just grown apart (no other party, no dv etc). We know it's over.
We have a big family holiday coming up in two weeks time, it's with my extended family and my dparents have paid for it. For the sake of the dc, I don't think it's fair to separate and stop dh from going on the holiday, and planned to have "the talk" with him when we return.
But omg, how do I get through the next three weeks? How do I pretend everything is fine when it clearly isn't? Now I've made the decision I want out, every little thing he does seems to annoy me and I can't help but think "I won't miss you doing that once your gone" etc. it's like he's giving me the ick iykwim and I struggle at times being in the same room

Please can anyone give me tips about how you managed to make it work, amicably, living together, spending time together etc, whilst knowing that it's over. I need to put some strategies in place asap

I suppose just view him like a colleague you have to be around for a few weeks, but wouldn't choose to socialise with. I'm assuming the physical intimacy has gone, or that might be awkward.
Is there a vaguely believable reason for you to share with DC rather than him?
Just keep telling yourself you know this is nearly over but no one else does, there's no point holding out so the DC enjoy a last holiday if it's tense and awkward

I think this just naturally happens sometimes in relationships. It's alright, once you have the talk it'll be easier. In the mean time, I can't offer much advice on how to get through the holiday without telling him other than to just focus on spending time with your extended family and kids, but I would suggest making sure you've taken everything into account so you're ready for separation. This may be helpful for you https://iamlip.com/help-guides/pre-divorce/ it's really useful for what you should do and everything you should take into account. As long as there is communication, I think that makes most things easier.
Hope this can help x

Thank you for the link, I have had a look through it and found some incredibly valuable information.

You are right, I think I need to speak to Dh now. I might try and see if I can sit down with him tonight, not always easy as he seems to avoid being around as much as possible right now.