Wow!! You are so brave! If your instincts are telling you enough is enough, then it is definitely the right thing to do.
Just remember this-- come back to THIS thread often, because soon you will begin doubting and maybe even losing your resolve. COME BACK and read your own threads. That is what I do when I'm feeling weak and lonely. I just come back and read my own thoughts and experiences about him and the memories just come flooding back.... Then I remember the WHY. I allow myself to revisit the pain, that way I can push on.
You are thing to do great! Ave you are doing the right thing. I don't know this person, but I do know that our instincts are generally pretty accurate and if you feel now is the time, then I would run with it.
Hugs!!!