Is what I am doing considered adultery, to which Allah's saying applies: "The adulteress is not married except by an adulterer or a polytheist," even though I am regretful and wish to repent?

What is known as "love and acquaintance relationships" between young men and women under the of pretext marriage is a gateway to evil and corruption. It leads to the violation of honor and the commission of forbidden acts, and it is far from the guidance of Islam, which protected women. Your relationships with each other via the internet or mobile phone are forbidden and considered an ugly sin, for the Prophet, peace and blessings be upon him, called it the zina (fornication) of the eyes, ears, tongue, hands, and feet. It is obligatory for you to cut off this relationship and hasten to repent to Allah by abandoning the sin, regretting it, and resolving not to return to it, while concealing yourself. Repentance erases what came before it, and it is permissible for a woman to offer herself in marriage to a righteous man, with certain regulations.