What do you think about me ruining my good friends chances with his ex by naming a girl we saw him cheating with at the bar with?
Why would you want to ruin his chances with his ex?
I think he deserves to suffer for this, he seems happier when he is in a relationship, I want him to be unhappy without a woman.
That is being really mean and hurtful to a friend of yours. They trust you and you are going to really harm your relationship with them.
He deserves it, they broke up a while ago. They both need to move on. I know what is good for them.
Even if you think you know what is good for them, you should not interfere in their relationship. You are his friend and he trusts you to support what he wants. You shouldn't betray him like that.