To me it's blatantly obvious that you need to communicate with him. Not just for the sake of your own relationship, but for your own growth.
Have you tried writing stuff down? Emails? Asking for permission to speak while you're doing a play session maybe?
You can also write out what you want to say for your own info, & either read it to him or give it to him, or just read it yourself to get your thoughts straight.
It's too easy in a D/s relationship for the sub to just 'go along with it' & let the Dom do everything. I don't agree with that way of doing things, I think it's got to be both people working on it.
No relationship can work without communication. Not forever anyway.
Seems to me that if he's as caring as all that, he'd be happy to listen.
Don't be complacent, sounds like that didn't work last time!

Tojo