in a way, the unicorn comment is telling, as you are hitting on how it is as far as your "getting what you want".
asking for it, wishing, loving, posting meetings, conversations, pleading, pointing out the rational...none of it has "worked". which is where those comments come from re letting go and leaving be and taking control of the things you really can control.
he might believe that "you are all i need" is an uplifting statement to the receiver, but in fact it is a horrible and unfair burden to put on another.
puts you in a horrid spot, and one that is not yours. i understand about the vows you spoke of earlier, and the commitment, and wanting the best and doing whatever you can. but there is stuff here you can't. beyond you.
stuff he has to come to want to do, or see the need of doing.
regardless whether that is about his relationship with the dog, you, booze, others, himself.
i'm sorry...sounds like i'm lecturing, when i am trying for empathy.