My dad is having an affair

So my mum told me tonight that my dad is having an affair. I was crushed. We haven’t always gotten on that well but in the last year we have been closer and many a time we have talked about having an affair and my dad always joked that he is “too lazy to have an affair “

When my mum told me I thought it would be like a fling. It’s not. It’s been ten years with the same women. I think I would have been more accepting of it if it was a fling, but it’s been going on for the most part of my life. I just feel so broken. The woman he has been seeing lives near me, where I go to uni, and he’s been staying with my godfather a lot to come and visit me, we would spend two or three hours together when he’s there for a weekend. I can’t help feel used, because he’s been meeting up with her when he’s been visiting me.

My dad is a well respected man, with high morals. We’ve been brought up in a strict religious household, and I’ve been in trouble before for “breaking commandments” and even at the age of 19 I still had to go to mass when I came home from uni. I just can’t get my head round it. Is that normal?

My parents are splitting up and I don’t know how to feel about it? How should I feel?

do u have any siblings? and are your mum and dad close?

I'm so sorry this has happened. There's not too much you can at the moment apart from support your mum. Do you have any friends who have been in a similar situation?