I need it to get more exciting

So I’ve been with my DH for 10 years. It’s to that point where I feel like sex should be more exciting. With both our schedules very crazy busy and hectic by the end of the day we are both pretty exhausted.

I’m am getting to a point of almost fantasizing. Asking myself what it would be like to have sex with other men. I’ve been with him since I was 18 and basically my only sex partner. I don’t count my first only once as being anything. And I am also his second partner the first was only one time and wasn’t a relationship (she tried to get back at her bf and he didn’t know this until after it happened then never saw her again)

Has anyone gone through this or have felt this??

I have also never been like this before. I would like him to get a little more aggressive but he’s more of the submissive type.