<human>: We've been together for a year and a half, and we love each other. However, he particularly enjoys making offensive jokes (such as rape, other controversial/inappropriate matters, etc.) and I have told him time and time again that I do not find these things funny, and that he should stop, or at least try to have respect for me and not say them in my presence. He insists that his humor stems from "the people he's been around" and that I should take it more lightly. 

Today (or yesterday, whatever) he made a joke regarding my dad's drinking and liver, knowing my dad has a drinking problem. We had a big fight over this "joke" with him saying that he didn't know it was going to hurt my feelings. Currently, I am not speaking to him. 

Am I overreacting to his humor? I truly feel as if this issue is gradually pulling us apart, because in my eyes, I see it as immaturity and childishness.

Could you distill the essence of the text into 1-3 sentences?
<bot>: Boyfriend of 1.5 years has sense of humor that I find offensive. Poked fun at my alcoholic father. Part of me feels like I'm overreacting.