Husband says he doesn't love me

My husband says he doesn't love me anymore and is going to move out, he says he needs time to think and doesn't know if he will be back. We have been married over 20 yrs he says all I do is keep on and life is too short for all that, but he not willing to try. I can't believe this is happening he has always been loving and caring to the point of obsession yet one day he woke up and everything had changed. I don't want to lose him I have begged pleaded cried but can't seem to crack this cast iron exterior he has suddenly developedd. He has become mentally abusive nothing i do is right, this has been going on for 2 months now and I don't want to lose him I want the person I used to know back

Sometimes when we least expect it.. people change, and not always for the better.. although this is very unfortunate, and I know you don't want to lose him; but if he's no longer happy, you need to let him go so he can find a new life. Same as yourself. You'll find a new and better life without him.. if you love something, set it free. If it returns, it is meant to be. If it doesn't, it never was. I know this is hard.. but you have to do what's right!