Hi Trophy
I'm also joining the chorus of those who say "ditch him" ... and good for you for making such a healthy choice. Now you can invest your own time into doing things YOU want to do - instead of being at someone else's beck and call. BRAVO. I'm sure it was not an easy decision to make, but don't beat yourself up over the time you've lost (ie: 8 yrs). Just be glad that you can now focus on living your life however you want to live it and you are free to engage in a caring, loving relationship with someone who truly respects you, cares for you and loves you for who you are.
Also, I think it would be nice if you were able to tell him you're ending it. If you don't want to see him - perhaps phone him? If you don't want to phone him - maybe email him? Granted, you don't "owe" him anything, per se (and as others will say, much less an explanation) but I just think that telling him to buzz off might make you feel better ... that you had the guts to end it and to tell him that it is YOUR choice to finish it. He's had you on a string all this time, wouldn't it feel good to tell him that you deserve better?
You don't need to be rude to him - just be calm, write down what you want to say, say it and then be done with it.
Then ... when you don't answer the phone or return his emails, etc, he will know why. And if you bump into him in the street or at the shop, you can turn and walk away and he will know why. There'll be no room for guessing games. And if he pursues you, try to ignore him as graciously as possible. You must preserve your own integrity in all your negotiations with him.
Good luck
Ps: If he tries to email you, you can set your email preferences to bounce back his emails to his own email inbox, without you ever seeing them. You can also delete his voicemails on your mobile - and if it gets down to it, change your landline if that's not too much of a pain.