<human>: I don't know where to begin. 

My wife has always been a large woman (300lbs) who is insecure and depressed. She has always had a bad, dark, sarcastic attitude. We love each other but during an argument I told her I'm very tired of the emotional roller coaster and she/we need to go see someone for help and maybe she needs to go back on medication. I told her if something doesn't change then I'm going to end our marriage. 

I'm not aloud to invite people over (I have 2 friends) without her permission, mainly so she can hide in the room and be mad. She is extremely insecure because of her weight and she says she wants to do something about it but she won't and she still eats donuts and burgers all day. 

Another thing that I can't stand is, when we're in public, around family or friends, she is a completely different person. She acts all sweet and innocent but as soon as we're alone the smile drops and she'll start talking shit about the people that we were just around. What's sad is this is the only time she seems happy and smiles but it's fake. 

We have 2 small children, I work full time, she works part time and we live paycheck to paycheck so we have many other stressful aspects of our marriage. I feel my mental health is taking a hit. I hate it when she cries in front of the kids. For a year now, half the time I feel that I love her and never want the family to split, the other half of the time I'm plotting my escape from this hell. 

I could go on and on. I love my children more then anything in the world and I kills me inside to think of our family splitting up. The worse part is, when I told my wife something needs to change or it's over and all she heard was "I'm gonna leave her". Now she's moping around acting like a victim and won't talk with me.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: told fat wife we need counseling and something has to change or it's over.  All she chose to hear was "it's over"