We all are somewhere in our hearts dejected. Impaired, felt terrible about our mistakes in life, want to go back and repair everything. Few relationships cannot be repaired. We are tired, lonely and desire to fill our hearts with love, joy and splendor. True happiness lies in connecting with the God concious believers and God.
We all are humans and spending our energies in the most constructive way to survive in this world. Forgive the ones who have hurt you and forget your own sins after Tawbah. This is the beauty of Islam, Allah forgives our sins (but people do not.) Getting connected to Allah All Mighty is a great way of relieving sorrows. The laws of Allah benefit us. His is the Authority and He is the Ruler.