Rephrase? 'The fact is, I feel like this and, to address this issue, I need you to do that'.
'I am lonely and unhappy. What you can do to change this is x.'
Or, 'for this relationship to work, I need you to do x / to be able to rely upon you to do y'.
Stop asking him to respect your feelings. Start telling him that they are facts. He deals with those facts appropriately or there are consequences - which may be a loss of respect, affection for or closeness to him. It may be a reduced chance of the relationship surviving.
I think it's a really rubbish trait, not believing things that he doesn't understand but it's quite common. You could point out this is what it is - failure to understand. He's not being clever and right, he's demonstrating ignorance, narrowness of perspective, rigidity, inability to learn. Being a bit thick.
Believing what someone says without needing to understand it, is a sign of love and respect IMO. Unwillingness to do this portrays a belief that the other person is only an accessory to oneself. A sub-set of ones own knowledge about the world, filed under 'helpmeet' not 'fascinating person'.