Hi KarenSue,
Thank you for your comment and kind words. I know he did not cheat on me. It's hard to explain and maybe for other people I'm just stupid and naive, but I am sure he never cheated on me. And I always knew what he likes but I always thought he has a high sex drive and this is normal. But now I'm thinking that it might be possible that he is a sex addict.
He felt depressed lately. He said it'work related as he's overwhelmed and unable to cope with everything. He said there is still a lot he has to know and learn and that he feels his not very productive. I think he sexualises stress and other things too. Does this make any sense? Not sure.
Thank you for replying to my post!