<human>: Can you provide a brief rundown of the text in within 3 sentences?

I'm 21 and currently at university living away from home. My parents marriage of over 20 years is in trouble and I don't know what to do. They've basically always had a good marriage and its only been in the last year that they've had problems, as far as i know anyway. The problem as I see it is that recently my mother has started going out with friends all the time and its leaving my dad feeling neglected. This has caused many arguments and now I think my mother has stopped loving my dad and is maybe having an affair. (I have reasons to suspect this) In a couple of months I'm going to be doing post grad studies and I'm going to have the option of either moving back home with my parents or to continue to live at University. I'd prefer to live at uni because its close to the library, would allow me to continue having a uni social life etc. Also when i go home for the holidays it's hell, the tension and the arguments are horrible. Living at home would be a lot cheaper and would maybe allow me to help their marriage. They've both said they want me home and tbh it kind of feels like that's because they cant communicate with each other any more I'm company for them, especially for my dad. My younger sister being with friends all the time mainly because of the atmosphere. I can't stand being home at the moment because of the situation but i feel so guilty about the fact that they want me home and maybe i cold help save their marriage. I don't know that being home will make it better, it might make it worse, I suppose there's always that chance that I could help. I just want some advice because this is making me so unhappy.
Thank You
<bot>: Parents marriage breaking up, have the option to live at home to try and help or live away from home because of it's crappyness at the moment.