Does a girl's Hajj become invalid if she continues her relationship with a young man she loves, and they are unable to marry due to circumstances beyond their control, despite their attempts to separate and their failure to do so?

The two young individuals must sever the forbidden relationship between them, as it could lead to adultery. The claim of inability to end it is unacceptable. One should repent of sins before Hajj to achieve an accepted Hajj (Hajj Mabrur). However, if the girl performs Hajj while continuing the relationship, her Hajj is valid. Hajj is not invalidated after assuming the state of Ihram (definition) except by abandoning the standing at Arafat, apostasy, or sexual intercourse before the first release from Ihram. Apostasy invalidates both Ihram and the ritual.