Need someone to talk to. Feel alone

I think I'm going to have a break down! I'm 18 a senior in school I've recently been realizing my mom has been acting really weird and fishy towards my dad. Me and my best friend who is practically my sister thought she was cheating on my dad. But yesterday my down was putting a fan in my room and me and my best friend asked him why him and my mom weren't talking and he said he didn't want to talk to her so I asked why and he told me I didn't want to no. But after asking him a few times he told me and my friend that awhile ago my mom told him she didn't want to be with him and he told me don't you notice she doesn't even sleep in the bed with me no more and he said he asked her for a divorce awhile back because he can't live like this no more. I'm so emotionally racked now I was crying last night when my friend left my house for an hour and then when she came back and I layed down to go to sleep I was crying with out my friend knowing and today a few hours ago I started crying again. I feel so alone now even when people are near me, I've said there was a light at the end of the tunnel but I don't see one anymore. I feel like I'm going to break down, I don't know what to do. I kind of feel like its all my moms fault. I just really need someone to talk to, to help me out

I'm so sorry you are going through this. Actually it's unfortunate that your whole family is going through this. You are not alone. Your parents love you, and it is killing them that they are causing this anguish. And you have your friend.
It's so unfair. You are an innocent casualty in a war. It will be hard, but you will get through this. Just hold on. I am always available to vent to.

Are you able to talk to your parents about it? Or one of your parents? What's happening in youir life right now is hard to go through and hard to understand. I hope you know that whatever is going on is about something that's happening between your parents and, even though it affects you greatly, it's no fault of yours.
Here's a link to a site for teens that talks about divorce. Maybe it will be helpful.
Dealing With Divorce

I've had a similar experience undecided, i understand no one was unfaithful in your family, but my mom cheated on my stepfather several times and they've been off and on for awhile, if you need someone to talk to, i'm always here, message me whenever you feel like it,

We're all here for you

What you are going through is one of the most painful things that can happen to a person. It is natural for you to be terribly sad. I'm glad you have a friend to be with. Sometimes people change and don't even know why they change. Whatever is going on is not your fault. It may not be anyone's fault. It's just difficult and sad. I'm sure there is a forum on this site that addresses the very thing you are going through. You'll find lots of support here. We all care about each other a lot. Join the group and we will get through this together.

Did you ever ask your mother about the situation. Sometimes people are happier when they are apart. I'm sorry that is something that you don't want to her, but its true.

It's always stressful for a teenager to face a situation when their parents aren't having all that great a relationship any more. However, it's necessary to realize both of your parents still love you and it has nothing to do with their personal relationship problems.