<human>: Can you succinctly summarize the text in 1-3 sentences?

I found out just after the new year that Dad had an affair. Both me and my brother were told at the same time by my parents. They have been married for nearly 30 years.

I moved away for work six months ago and now live four hours away from either of them. I'm fortunate in a way that I'm not at home and able to disconnect from the situation.

Dad lives away during the week for work and Mum lives at the family home. They have been meeting up regularly but after a recent phone call with my Mum they are no closer to deciding what to do. She found out about it in September.

I've been cheated on in the past so kind of understand how Mum feels. But I don't know how I should feel about my relationship with my Dad.

Since finding out just under four weeks ago I have hardly spoken to him - mainly out of choice. I spoke to Mum yesterday and she said that Dad was worried about his relationship with me. 

We were/are really close and she was telling him that I had been in touch with her. He said he'd not heard from me for a while and that "I always used to find time for him." My response to hearing that was "I'd be worried too if I were him."

I'm due to see him for the first time since finding out next week. I don't know if I should say anything to him, or even if I want to see him.

I don't know if I'm asking for advice or just want to vent.
<bot>: Dad had affair. Due to see him next week but don't know what to say to him, if I want to speak to him, or even see him.