How can one deal with intense attachment to a girl and the desire to marry her immediately, given the difficulty of staying away from her, and what is the way to deal with this passion that increases day by day?

If you are unable to marry the girl, then stay away from her to avoid forbidden love, which may lead to polytheistic love, by equating the love of a created being with the love of Allah, or preferring it over the love of Allah. This is what Allah warned against in His saying: [And of the people are some who take others as equals to Allah. They love them as they should love Allah. But those who believe are stronger in love for Allah.] (Al-Baqarah: 165).

To cure this ailment, follow these steps: 1. Devote your love and deeds to Allah alone. 2. Implore Allah to remove this attachment from you and to grant you His love and the love of that which brings you closer to Him. 3. Occupy yourself with what benefits you in your religion and worldly life, for whoever gives up something for the sake of Allah, Allah will compensate him with something better. 4. Know that your statement "I cannot live without her" is a deception from Satan, for every soul will taste death. 5. Remember that you were created for the worship of Allah, and no preoccupation should divert you from it. 6. Fill your free time with obedience to Allah, reciting the Quran, and seeking sacred knowledge.