If you can't afford Relate, how about seeing if your library has any relationship advice books, they may give you some tips on making those changes.
Once a week have a meal together, get the kids fed & away to bed then the 2 of you enjoy a meal, share a bottle of wine. Little things like lighting a candle help create an intimate setting.
Go for walks together, every now & again send him a text telling him how much he means to you. Lots of little things you can both do to show you care.
If you're looking for ideas to spice up the physical side of your relationship then try looking at an adult game on Amazon called monogamy it's got a lot of good reviews.
Good luck hope it goes well for you both.
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