It must be hard for you to get your head round this. Have you told your mom how you feel?
Remember whatever happens between your parents it doesn't affect how they feel about you. You can approach this the same way you would with anything you want to manifest. Uses all the techniques the same.
But most importantly you need to picture both your parents happy. Try to talk to them often and keep them close to you and the communication flowing.
You can talk here. Some people on here will surely come along with great advice. You will be ok. Keep positive even if you find it hard.

Don't approach her with anger. Approach her with understanding. She sounds like she is not being reasonable with you right now. But I think she's in defense mode. One big shock for me growing up was that parents can be very childish too and not always able to do or say the right thing because of their feelings.
When things calm down., approach the subject with something like. How you want her to be happy you didn't realise that she had been unhappy and felt she needed to find affection from someone else outside the family. Say you don't want to make her feel guilty. You want to be able to get your head round the whole thing, and would like her to simply hear your feelings.
It is a difficult situation and a lot for you to burden. The LOA pros on here would say picture a different reality.
maybe do some Remote influence on your dad. Get him to say I love your mom so much I forgot how much, I need to show her how much, I need to make her know I appreciate her. That is just a suggestion.
Be strong and try to show your mom some understanding she will appreciate it and help keep the calm between you.

Hisoneandonly wrote:

Long story short... my mom is having an affair...because she thinks that my dad had did the same thing to her and she has fallen out of love ... I'm so stressing out that my home is no longer a home now... it's falling apart.., I'm sorry that I know I can't help this... and brought a negative thread for you guys... I just needed a place to talk this thing out... or I think I'll be crazy....

Honey   That is so hard for you    Do you still live at home?   makes it even harder    Sweetheart  I know this is hard to do   but try to ignore the situation    You have nothing to do with what happened   think only loving thoughts to both parents    shower them with loving thoughts   hey  do some visualization they are back in love   and they work it out