He is going to ask the Diamonds for help.
After all, they are the only ones who can understand what he is going through.
Unfortunately it turns out they are all doing really well: now that they are free to do what they want they have all found ways to express themselves... and being free from the burden of command is like being freed from thousands of years of slavery.
They all try to understand him and help him, but gradually the horrible truth dawns on him that Pink Diamond is alone and unique in the universe.
Spinel, the gem who was made to emulate Pink, has a heart-to-heart with him and for a few minutes it seems like he finally has found what he needs - until at the very end it becomes clear she really doesn't understand at all.
That's the final straw.
The tantrum that follows makes clear that it wasn't White who originally split Homeworld in two...