Most Helpful Guy
I'm sorry to hear about your situation. It's not easy and I can only imagine what you are going through. He is still your dad and you will miss him no matter what he has done to you. We can't make the decision for you, but all I can say is your dad is in the wrong as much as the other women because it takes two to ruin someones life and family in this kind of situation. Best way to figure out on whether or not he's still worth investing your time with is by questioning or reflecting if he still cares, loves you and there for you when it counts the most. Only then can you truly answer your question.
Most Helpful Girl
Also keep in mind its not like she dragged your dad away, kicking and screaming. It takes two to tango. He's just as guilty as she is.