What is the reason for my suffering from insomnia, continuous exhaustion, sudden awakenings, constant forgetfulness, and the deterioration of my performance at work, and can help be provided to me before I think about suicide?

The committed person does not say, "I am tired of commitment," for it is a means to Allah's pleasure, Paradise, and a good life.

Seek stability for your heart by reciting the Quran and reflecting on the stories of the prophets and the righteous.

Turn to Allah in supplication, asking Him to keep you steadfast in His religion, and be keen on good companionship.