DP (of 13 years + 2 DC) moved out at the end of last year.
Youngest DC was 14 months. We have zero family where we are so no help with the children (literally one night out together per year) and I struggle with making friends so was feeling very down and isolated and we were snapping at each other, I was resentful of his nights out etc. Our sex life was nonexistent (he wanted to, I shut him out) I felt like life was passing me by and had this idea that if I had some childfree time, I would suddenly magically have a sex and the city-esque group of friends and lots of nights out etc
.
The reality has been somewhat different. I spend my child free time watching films and walking the dog and having more baths that I thought was humanly possible. Which is enjoyable and all. But I miss the DC when they're not here.
And crucially, I miss ex-DP 
Our shared history, our memories. The way we 'get' each other is like nothing I've ever experienced before. Our interests and sense of humour are so in tune. We've had one night out together since splitting and it was more fun than any of the dates I've been on/few nights out I've had. Youngest DC is getting older and more manageable and we could ask DP's mother to come visit more often and incorporate a night out with her babysitting more often.
I feel like an idiot for pushing for this separation in the first place. And he could very well be dating other people and be happier without me.
In a lot of ways we've failed at splitting up. We text each other throughout the day, he comes over a few nights a week so we can watch 'our shows', we're going on holiday as a family in the summer as we usually always would.
What do I do? I feel like the right thing to do is to wait to see if these feelings subside before saying anything.