The above (MICKEY) is correct...
NEVER, EVER, even begin to hope/dream/expect that somebody will change.
When people show you who they are, BELIEVE THEM.
OP, I will say this again.
This guy sounds just classic.
Take what I want/need, and give NOTHING back.
(Seriously, he doesn't even really know or care about your children...)
I am thinking that if you are so wrapped up in this one-sided relationship, then how CAN you 'know what you want'.
Why does this relationship have to be considered so exclusive, if you are living separately.
Why can't you explore other options?
Is he insisting that there is 100% commitment here, and you can never consider seeing anyone else?
I am remembering something that made the rounds on social news a few years ago... the advice that one well known person had put out there, it was something like: "Be with/Live with a person for two years... THEN make up your mind". IMHO, your two years are now over... You are still trying to make up your mind.
If you truly are happy and satisfied in this arrangement, then hey.... My opinion doesn't matter. Ignore it.
But, since you came and posted here, something tells me that you are not sure you are happy.
I agree with the person who argued against that advice, a man, who then went public with the thought that, for women, this two-year thing was the WORST advice... EVER.
WHY???
The guy gets two-three-four years of her life, scott free....
And, the woman is giving up one the most precious and important things that she could.. her youth.