1st learn to accept the separate anxiety with your kids 1st.
Soon, you will be able to go on a movie date without the kids. (Go more with kids, if your kids can't sit through the movie, soon you will feel no kids is better.)
Of course, if you have budget, have more holidays and staycation. Will tend to feel different when we are away from home.
Do go out more often even though with kids, have more talks about different things, dun always talk about kids. Once communication stop, that it.. Always have things to talk on.