Well he!! yes show him you're upset. Tell him he's definitely making a mistake but that you're done. Then BE DONE.
Let HIM chase YOU if he honestly decides he wants to be with you, but you hanging around being his Plan B and hoping he will choose you if you just don't make waves is NOT WORKING. Make him face the consequences of his behavior which is LOSING YOUR COMPANIONSHIP. Tell him you are not willing to be in a relationship with someone where there is a third party so ADIOS!!!
I'm sorry he did this to you. Get on out and start dating, find some man who treats you like you deserve to be treated.
