One of the biggest hindrance to personal growth is holding on to the past.
In order to be happy in the true sense of the term , it is very important to be in the present.
So, you must learn to release the ghosts of the past and clear skeletons from the cupboard.
Once we are able to feel the emotion and then release it , we also release all negative influence it has over us.
The most important part of letting go is approval of peoples. Once you can let go of the need of being approved and liked then you became immune.