So he first said he will force you to pay for two cars but then he tells you he loves you, all in the same day. Surely he can see the contradiction

I’d not tell him that I am in tears or broken down. For a narcissists it’s heaven to know how much they and their actions matter to others. Just tell him you are busy with your life and have no time for this or tell him nothing. Otherwise it’s endless cycle of you telling him how much suffering he is causing and it encourages him to do another cycle of pleading so he can hear some more how much he matters to you.

Kick him out of a power seat