Well, put away the shotgun, that will only get you jail time (hard beds, bad food).
Anger at injustice (real or perceived) is not necessarily a sin, but what you do with that anger can be. Have you let it fester into resentment or bitterness? That will only keep you an emotional prisoner of the other person, and it is really bad for the heart, growth of tumors, weight gain, and is the enemy of a creamy complexion!
Most people have a strong desire for justice and their anger is often a response to feeling the other person is going to get away “scott-free” with their 'crimes'. God promises justice, but in His time and His way. We have to stop trying to be God.
All of my family members (uncles, aunts, parents, on both maternal and paternal sides) had arranged marriages and you can see the love in both partners especially today. My mother did not want to marry my father when she was told to; but she is head over heels in love today, always saying how lucky she is to have my father. In arranged marriages your parents choose the match for you based on family background and upbringing to guess whether your future would be secure. If your parents love you; their choice is likely to work out for you. I think checking an individual’s family is a lot more reasonable term to enter upon a relationship meant for marriage, than lust. I’m told my parents had it easy–