Hi Kate, I am so sorry that your "friend" and your supposed loved one have put you through this. no one deserves that kind of treatment.
The only silver lining I can see is that at least he told you to your face and you diddnt find out some other way.
that aside, I applaud your decision to leave, I think you have done the right thing, but only you can know in your heart of hearts if its the right thing for you.
sending you lots of squishy warm hugs, I hope you have a lot of support from family and friends.
oh and also, its not up to him who you speak to or not, thats your choice. You are not the one who has done the wrong thing here.
Thinking of you xx