It's good you have noticed and are making an effort to do something about it now.
Taking time out to be together, to have fun, to just 'be' rather than doing housework, rushing about and doing separate things in the evenings (one of you on the laptop, one watching crap on tv etc). I know this will probably get a lot of
's but I find that playing a board game or cards or something is a good way to spend time together - even more so if things are a little strained, it's a way of spending time together that is interactive, but not 'talking'... (but I love games).
If you have friends/family/babysitters then go out - just the two of you, or better still, let the kids have a sleep over with someone who is dying to have them!
Even spending time as a family in a relaxed way, without constantly tidying up etc will help. Go somewhere the kids can run free without you following them about and have a picnic, feed the ducks - get some sunshine on your bones!
Buy him something when you see something you think he will like (doesn't have to be ££££), just something to show you were thinking of him.
Make each others favourite meals.
Massage, foot rub... take a bath together (if you can fit!!) it doesn't have to end in sex, but hey.... :)
Just 'do' less and 'be' more x