It is the only way to make your life better again. Find something to give you purpose. It could volunteering for a charity, or adopting a pet from a shelter.
how do you get the will to get up back and do the things you have to do everyday? i mean,after going through something that changed your state of thinking and living?
Take one step at a time. It's like climbing a ladder. Take the first step, look around and see that's it's okay and then take the next step.
If its needs to be done? Just do it. Will or no will.
U may have to force yourself for a while. It'll take time but it gets easier with time. Greif is different for everyone. There is no rite or wrong. Just u.