What happens when your mom is out off control mentally and emotionallly and my dad is going to leave her but I don't want him to cause I love him and miss him and I want to c him and Should I let him go? My dad can put up with her I mean he's done it my whole life but I Don't WANT HIM TO GO cause I don't know what's going to happen to him. What if something bad happens and I don't know about it, or what if I never c him again? What will happen to my mom? I LOVE MY DAD so much!! Some one please help me I don't want to loose him!!
Sincerely Rebecca

Ask your dad what about you and tell him your worries about him not being there for you.
It doesn't sound fair that he would leave you with someone that he can't handle. If she is so out of control that he can't deal with her-what about you having to cope with her on your own?
You need to ask him about that.
What types of things does she do? Could it be a danger to you?

Sometimes divorce is the best choice. My parents have been divorced for seven years and they are so much happier now that they aren't together. Just because your parents will split up doesn't mean you'll never see your dad again. The court will decide how often you see each parent.

Parent is a father or a mother who cause your birth

First, calm down. You love your Dad - he taught you your whole life to love him through the way he treats you and has raised you, and that is not going to change.

Second, let him know you want to live with him because of your mother's instability - he may also think that would be for the best. Then, let your parents figure it out. It's their job, and you have no authority anyway so will make yourself crazy trying to run the show with no power to do so.

You cannot possibly make your father stay, or fix your mother's issues. These are adult problems and will be resolved by the adults. What you can do is tell your father, "I'm scared about not seeing you again and I'm scared about being left alone with Mom because she's clearly unstable mentally. I love you both, I still want to see her, but I want to live with you. And, not knowing what is going to happen has been really hard for me." If it's too hard to say, write it in a letter and give it to him.

Just know, you can't fix it - you can only let your worries and hopes known to your Dad and then see what he works out for you moving forward.