I got to a stage in my relationship where I was irritated and angry with my dp. It seemed like there were several options (stay and be unhappy, have a relationship with someone else, leave and cause heartbreak and disruption to my children) but all of them felt like terrible choices.
I decided that I would see what I could do to maintain my relationship and I deliberately set out to make things better. Of course there was nothing that I could do to change my dp, so I had to change some of the ways I was thinking about our relationship and my needs.
One book I found useful was by John Gray (of Mars and Venus fame). He described a number of different "love tanks" e.g. fun, family, friends, parental love, a spiritual dimension, giving to a community, self-love etc.
If I recall correctly, his analogy was that while one tank was actively "being filled" e.g. during the falling in love stage, then we have a great feeling of fulfillment (even if all the other tanks are empty). He also suggested that when any particular tank was "full" we did not feel continual fulfillment, but rather boredom, restlessness or dissatisfaction.
Trying to continue with filling the same tank (i.e. struggling to work on the same aspect of your relationship) would not make it any better, but starting to fill up another tank might.
Anyway, similar to you, I needed someone else to initiate fun, someone else to have meaningful conversations with. I did wish it would be my dp who did that, but that was not strong in his personality, so where else could I safely get that?
I now have a group of friends who I see / phone / email and with whom laughter flows until we are in tears. This in turn enable me to have a more humerous touch with dp, who is more funny in return.
I think I could see that whilst my dp had many great things, and I loved him deeply, I had got to a stage where I was expecting him to meet all of my needs.
Don't know if any of that makes sense, but we are now happier then ever.