If you love the person of the opposite sex very dearly, but you love your parents too, and not to disregard your parents' trust in you, you do not speak your love out, is this Okay? Or should one express what one feels, even though it would be against the parents' trust and their restrictions?

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.

It is forbidden for both sexes to have affectionate relationship with the opposite sex (i.e. with a non-Mahram woman/man).

Whosever is put to trial by this, he/she must repent to Allah Almighty, ask Him for forgiveness, and conceal his sin.

He/she shouldn't inform his/her parents or anyone about this prohibited act. The Messenger of Allah said: “Avoid these filthy things [sins] which Allah has forbidden, but if anyone commits any of them, then let him conceal that which Allah has concealed, and let him repent...” [Al-Hakim and Al-Bayhaqi from ‘Abdullah Ibn ‘Umar]

Also, the Prophet said: “All the sins of my Ummah (nation, followers) will be forgiven except those who commit sins openly or disclose their sins to the people.” [Al-Bukhari and Muslim]

Telling the parents about it will make them angry. This could lead them to be displeased with you and mistrust you, so you must make your parents pleased with you.

We ask Allah to give us and you the success.

Allah knows best.