How can one reconcile loving a girl who sets conditions that include prayer and refraining from cigarettes, with an inability to quit smoking and facing difficulty performing prayers due to satanic whisperings?

A Muslim must repent from all sins. The brother's question included violations of Islamic law from which he must repent: First, his speaking with a foreign woman in words of love. Second, his abandonment of prayer, which is the pillar of the religion. Third, his smoking, which is among the prohibited evil things. He must cease these sins, regret them, and resolve not to return to them. He should propose to the girl in an Islamically lawful manner if she is of good character and religious commitment.