How can one deal with deep emotional attachment to a married university professor, coupled with despair of marriage due to the father's rejection of suitors for flimsy reasons, and a feeling of loneliness and alienation from an uncommitted family?

The woman's guardian should not reject a suitor of good character on the pretext of marrying off the eldest daughter first. If he persists in rejecting suitors, he becomes a 'adil (one who unjustly prevents marriage), and the girl has the right to refer her case to a judge to arrange her marriage. You have erred in continuing the relationship with the teacher by exceeding the bounds of lowering the gaze and appropriate speech, and your admiration for him might be due to emotional emptiness.

It is advised to repent, cut off the relationship with the teacher, delete his number, and only enter his classroom out of necessity and accompanied by a female colleague. It is also advised to seek righteous companionship, memorize the Quran, pursue knowledge, strive in calling to Allah, and show dutifulness to parents, even if they are neglectful, for pleasing them is a cause for Allah's pleasure and entry into Paradise.