I dont quite know how to feel....

Tweet

So a couple days ago I discovered my Dad has been having a 7 year affair on my mother and has practically been living a double life. I've had a lot of pent up anger for my Dad due to drinking too much, smoking pot, and anger issues but there he was still my Dad and I loved him. Now... I don't know how to feel. I don't. A huge part of me is now thoroughly disgusted with him. My Mom is such a wonderful, loyal woman. Shes never ever said or done anything out of line that would hurt him and yet he's done that and so much more. So I have so much anger and hatred towards him for doing this to her. But how should I be feeling?.. I feel hurt, confused, angry. I feel cheated too. He hasn't been part of my life really and now I know why. Before I thought it was just the drinking that came first, but now I know it was some woman too. To him alcohol and a mistress was more important then his family. I feel like she stole him away from us. Should I forgive him? Should I accept this?.. Should I just enver speak to him again? And then I have constantly been questioning exactly what he was like in this othe rlife of his. HOw different is he. How much more interactive with her and other people in their life then he was at home? I feel so betrayed. Has anyone ever gone through this before?.. Thoughts, advice, anything would be helpful.