Making it magical

How do you get the sparks going in your relationship again after being together so long? Me and my fiancé have been together for 11 years and just found out we’re pregnant with #3. He just recently started sleeping in the basement away from me and our kids and idk how to get the sparks going again. We have a great sex life but everything else just seems so awkward now. What am i supposed to do? I miss how things used to be😔