I'm so sorry that happened to you. It's terrible that this is the kinda world we have to live in. Too much judgement and not enough compassion.
Context helps me with stuff like this, and I know some stuff about teenagers. There have been studies that show, when it comes to empathy, teenagers (especially boys 13 to 16) have the same emotional patterns as sociopaths. They are basically incapable of empathy. You don't have to forgive this fact, many teens have the ability to reason their way out of sociopathy. Just don't let their crappy teenage brains and words wound you deeply. It's not you, its all on them and their biology.