Do I have a right to be upset?

I was once engaged to the father of my son. We were young when we had my son and got engaged.. He abruptly ended things when my son was 9 months old and made life a living hell for years after.

Now he never calls my son, never tries to see him, never emails, nothing. When he does see him, it’s always short.

Today in the mail I got a wedding invite addressed to me and our son..

I want my son to have a relationship with him and I never keep him from him. however, his father literally never tries.

Do I have a right to think it’s rude to send me a wedding invite addresses to me? I can understand addressing it to our son. That’s his dad. But to me??