I once had a girlfriend who was ten years older than me. Then, more recently, in 2016, I became friends with a girlfriend who is 15 years younger than me and it was just perfect. Unfortunately for me, she left the area and relocated to Pennsylvania. We still keep in touch, but it is not the same as seeing each other and visiting each other. But I cherish her friendship.

Maybe you will do better with girlfriends considerably younger than you. And they won't be set in their ways and will be flexible and fun to have around.