So fucked, and you LOVE IT.
So, you need to reinforce this behaviour, both directly, and more subtly.
Send him little messages about how horny you are, tell him you feel like you’re on a high, things like, ‘I can’t believe you NOT letting me cum makes me feel this good’, ‘All I can think about is sucking your cock’ etc
And with that last one, the subtle stuff is act on it all, dress sexier, suck him more and longer than you ever have, get our prehensile minds to make the connection between NOT letting you cum, and you being a super slutty dream come true.
It might take a while, but we get it in the end.