Because...

Because I've been fooled too many times already, and I won't be fooled again.

Because there's no deception worse than self-deception.

Because I won't unconditionally accept someone who takes but does not give.

Because one does not assess merit by all the wrongs I've committed over all the right things you've done.

Because the number things you've done right by me has been painfully small that even THAT comparison is only marginally in your favour.

Because a man that you've taken shameless advantage of for 12 years no longer exists and is finally willing to stand up to you and cut you out of my life.

Because you are a bully, and I hate bullies.

Because you are a coward, and I hate cowards.

Because when push came to shove, you neither pushed nor shoved. You ran away.

Because I've lost friends because of you. Not one. Not two. Multiple.

Because, in spite of everything, I've given you chances that you never even recognised as chances.

Because you never said sorry, and meant it. Or even remembered that you said sorry.

Because you are a parasite of the worst kind.

Go run back to the people that you can deceive into thinking that you are a decent human being. You don't fool me. Never again.