I made tawbah with real tears once, but the desire for the sin is still burning inside me. Was my repentance even real if I still want it?
You wept before your Lord, and those tears were not wasted. They fell upon the Most Merciful, who counts them. The desire that still stirs in you is not proof that your turning was false. It is proof that you are alive and still on the road, not yet arrived at the garden where longing itself grows quiet.
Repentance is a turning of the will, not the sudden death of every feeling in the body. The word tawbah means to return, to set your face toward home again. A traveller can turn homeward while the old road still calls to him from behind his back. What matters is the direction of his feet, not the whispering behind him. And Allah speaks of such a returning soul in these words.
“And those who, when they commit an indecency or wrong themselves, remember Allah and seek forgiveness for their sins, and who forgives sins except Allah, and they do not knowingly persist in what they have done.”
Qur’an, Al-Imran 3:135 · meaning
He does not name the one who slips and then remembers Him a hypocrite. He asks instead who forgives sins but Allah. And notice that the verse does not require you to be free of every feeling. It asks only that you do not settle down knowingly in the sin, that you keep turning your face away from it. That the desire troubles you at all, that it does not sit easy in your chest, is itself a sign that faith is awake in you.
“If a servant intends a bad deed and then does not do it, Allah records it for him as a complete good deed.” (In another narration: if he leaves it for Allah’s sake.)
The Prophet (peace be upon him), Sahih al-Bukhari (6491) · meaning
The people who knew the heart called this quiet, daily refusal the greater struggle, and they said the reward lies precisely in the resistance, not in feeling nothing at all. So do not wait to become a person with no desire before you count yourself among the returning. Every hour you feel the fire and still choose your Lord, you are winning a battle that is being written down. And this longing does soften: with time, with prayer, and with the nearness that grows slowly in a heart that is watered.
One small step: The next time the desire rises, pause and quietly say in your heart, “O Allah, I am leaving this for You,” then busy your hands at once with one small good, even a single sip of water or one whispered istighfar.