I agree with EveryOne here - You should look for another Relationship.
Perhaps He can't commit to You because of Your attitude toward His Children??
You "find it difficult that Your Partner has 3 Children"
"while trying to understand this, you find it painful"
"You don't get on with His Children":
This BEGS Disaster!! for a Relationship/Marriage asThose Kids aren't going away, They were here before You.
He needs SomeOne who will Love His Kids and You need SomeOne who has not already had Children.
I would say this relationship isn't ticking any of your boxes and you should find someone who does.
All the best.
Hi there and welcome to the forum. Must say that I agree with above. Sadly, this relationship does not meet the expectations you have for a relationship. You should feel cherished and loved. This man doesn't want to commit. Every day you are with him ---- you are keeping yourself from something better for yourself. I'd move on and get on with your your life so that you can fulfil your dream of marriage and children. Peace and good luck
He Belle, your last sentance is what i would go with, find a better relationship, this is way to much for you.