Your story reminds me of my experience. I am in UK too, had a "Colourful" lifestyle like yours and boyfriends like your C6 before. I dump him in the end. His experience is very similar to your C6, from a very poor family, mother died at a young age, supporting himself through university, become successful and rich, have OCD like your C6 who cannot stand hair on the carpet. He was crying when I dump him.
We got together because I was ill. A girl who has no one. He took me to the hospital, a 1hr drive. I really appreciate his effort. He is older than me too.
If we did not break up, our story would be very similar to yours.