You owe him nothing. "A few months" is basically how long it takes for the honeymoon to wear off, and it sounds like that's happened here. He figures he has you and no longer has to impress you.
Well he succeeded: you're unimpressed.
The last thing you need while trying to keep your health and wellness up for baby-building is the stress and danger he brings into your life.
It sounds like he isn't ready for any kind of a relationship, and not remotely ready for a polyamorous one.
“As I am sure any cat owner will be able to tell you,
someone else putting you in a box is entirely different
from getting into a box yourself.” —bisexualbaker