He bought you a house? That is quite unusual. I really don’t know anyone buying someone else a house and I know well-off people. His girlfriend likely meant he was like a sugar daddy to you because of extravagant financial support he gave you, not as much age difference. Is that why his kids didn’t like you? Although he is within his rights to buy girlfriends houses but his kids might think of it differently. Do you still live in the house he bought?

It’s not realistic to believe that he will keep promises about something when it’s already known he is a liar and a cheat.

Try to move on. I see no reason worrying about him. He seems to be doing fine. Focus on your own life. You can do it