I’m guessing the people that you consider to be the “left” are who people on the left consider to be the “right”. This isn’t a left/right ideological issue. People should be allowed opinions and we should each be allowed to agree or disagree, in whole or in part, with the opinions of others. Through those opinions, agreements, and disagreements we should each form our own morals.
We lose our ethics and our society when we stop listening to each other’s opinions and morals and instead dismiss each other because they are not from “our side”.
“Love doesn’t hurt”, meaning someome who truly loves you will not intentionally hurt you.
People of the age you described are not good at expressing themselves, but as you grow into more mature relationships, it should always be that love doesn’t hurt.