I understand what you mean about needing fun in your relationship, but you need to tread very lightly. Very very lightly.
In my case, my H seemed to want to spend time with me, so I accepted those invitations.
I worked on GAL, and some times he asked if he could join me. I accepted his company.
And at the beginning, when we both knew R talks were bad but we had a hard time falling into them, I suggested we watch a new show together.
Me: 44 H: 44 Kids: 20, 16, 16, and 10 Together/Married: 22 years H announced he was emotionally detached and considering D: 4/4/16 H announced he is going to try to stay and reconnect: 5/1/16