Need advice

We'll be married 5 years coming up with almost 3 kids (prego currently). I feel like romance and spontaneity is lacking in our relationship.

When I dated him it was there. Should romance be the man or woman to make it happen? Both?

Idk, how do I go about bringing it up without being offensive? Our marriage overall is great, just that small thing is missing!

Any tips or ideas to do since our 5th anniversary is coming up?