BLOCK HIM
The sooner he can't get in touch with you, the sooner you can properly grieve and move on.
If he can contact you then you're going to cave at some point and you will hate yourself for doing so.
If you feel tempted to speak to him or feel sorry to him, remember this:
He told you after years together than he sees you as a fuck buddy. A friend with benefits. Nothing more than that.
Don't feel sad or guilty, feel livid and happy you know this before you have a mortgage, marriage or children with him!
I've had two guys like this (one for 3 years, one for 4 years) and both tried to get me back. One was successful and I've never regretted something so much.
He has told you his ideal is to keep shagging you but have no commitment. Think how utterly disrespectful that is.
He could find someone else to shag, someone who just wants that to. He's such a lazy, entitled prick he's basically telling you he wants casual sex but can't be arsed to put the effort into finding someone new to have it with.
He's gross.
Please, please, please block him! No good can come from engaging with him. No good at all.