What should a committed girl do who memorizes the Quran and repents from a sin she repeatedly returns to, and who feels that she is a hypocrite and that Allah does not love her?

Sins committed in solitude are among the most dangerous sins. Therefore, whoever falls into them must strive against themselves to get rid of them and repent to Allah with sincere and truthful repentance whenever they sin. Allah accepts the repentance of His servant as long as they repent to Him. Allah Almighty said: "And those who strive for Us – We will surely guide them to Our ways. And indeed, Allah is with the doers of good." One should not despair of Allah's mercy; rather, one must frequently perform effacing good deeds, remembrance of Allah, and supplication.