Relationships aren't meant to be fun? Listener question follow up to 11 Feb podcast

“Relationships are not meant to be fun”What? Why?How can you say that so confidently?!?When I left my first marriage, I could have said exactly what the listener said in your podcast.I know I did not do my work then as it was all about him and why I couldn’t continue to be in the relationship because of how he was.However we have 3 children and so have stayed in touch and actually have a lovely relationship even though he has not changed in any way that I can see.So I can honestly say I love him, but would not consider living together again.So my question is….If relationships are not meant to be fun, why would one ever consider being in a committed one?Why not just do your ‘work’ with all the relationships in your life and then have a partner just for fun?As usual looking forward to and dreading your answer.