Obsession in a relationship?

This is a weird one.. I’ve been with my partner for 5 and a half years, we have one child who is 3 and I’m pregnant.

Throughout our relationship I get this slight obsession with my partner, I literally want to cuddle him all day, it’s as if we’ve just started dating.

Right now I’m going through this phase again and it’s so strange how I can feel this much ‘obsession’ towards someone I’ve been with for so long. It’s almost as if he’s someone I can’t have if that makes sense.

I’m constantly asking him for cuddles and kisses and I think it’s annoying him. He doesn’t understand how I’m so clingy.

Is this normal?