No matter how hard I try to get out from negativity still I can't... It again come back.

It will keep coming back again as well. Each time, you learn a little more about dealing with it.
Called coping strategies. In time, the negativity will not be so daunting because you know you can get through it and come out the other side more the wiser.

You will have to drop negativity and stretch that goodness for a good long time for it to sustain and become new normal

I know it's pretty amazing right