What should I do about the hesitation and distracting thoughts caught between the intention of sincere missionary work for Allah and drawing closer to a committed girl, and should I leave the website that brings us together?

One should thank Allah for the blessing of guidance and uprightness. The temptation of women is great, and its danger to a young man is significant. The Sharia has warned against the causes of falling into it, such as gazing, intermingling, and listening to a woman's voice. Allah has forbidden following the footsteps of Satan. One must abandon any website that provokes evil whisperings to protect the heart, for there are many da'wah (Islamic propagation) websites, and avoiding temptation and its causes is more emphasized.