Wa alaykum assalam warahmatullah

In the Name of Allah, the All-Merciful, the Mercy-Giving.

All praise is due to Allah. Peace and blessings be upon His Prophet Muhammad.

Never despair, brother. Allah is All-Forgiving, Mercy-Giving. In His holy Book, He clearly declares “Say, [O Prophet: Allah declares to humanity]: O My servants! Those [of you] who have committed [sins in great] excess against their own souls, never despond of the mercy of Allah! For, indeed, Allah forgives sins, one and all. Indeed, it is He [alone] who is the All-Forgiving, the Mercy-Giving.” [39:53] In another verse He also declares “Indeed, Allah will not forgive associating any god with Him. But He forgives anything less than this for whomever He so wills.” [4:48]

The door of repentance is always open for those who sincerely return to their Lord. The Messenger of Allah (peace and blessings be upon him) said, “Allah, the Exalted, stretches out His Hand during the night so that those who commit sins by day may repent, and He stretches out His Hand in the day so that those who commit sins by night may repent. He keeps doing so until the sun rises from the West.” [Muslim]

It is the Satan that casts these whispers into your mind to drive you away from the path of Allah and make you feel despondent and downcast. You just need to keep knocking the door until it is open. Try to come closer to Allah through different kinds of worship. Keep reading the Quran with an open heart and contemplating mind. Clean your heart with the tears of regret and repentance. Be sure that Allah will never let you down.

Sincere repentance requires you to quit the sinful act, regret what you have done before, and resolve not to do it again. If you have done injustice to others, you need to remove the consequences of this injustice as far as you can. If you have taken someone else’s property unlawfully, you have to return it back. If you insulted or beat someone, you should ask him to forgive you, and usually people pardon and forgive. If you backbit him, you should only pray for him and ask Allah to forgive both of you.

The Prophet of Allah (peace and blessings be upon him) said, “He who has done wrong to his brother [in Islam] regarding his honor or anything else, let him ask his forgiveness today before the time when he will have neither a dinar nor a dirham. If he has done some good deeds, a portion equal to his wrong doings will be subtracted from them; but if he has no good deeds, he will be burdened with the evil deeds of the one he had wronged in the same proportion.” [Al-Bukhari]

Almighty Allah knows best.