Is it normal not to feel forgiving toward dad in this situation?

Asked by troubleinharlem (7999) October 23rd, 2009 from iPhone

He’s having an affair. Also, he’s bringing her to thanksgiving dinner.
How can I work my way up to
forgive him, if I ever do?

I also feel like I can’t trust guys that want to be in relationship with me. How can I get over that?

this is totally a legit and real question