Most people would feel weird if someone they dated for few months showed up to the funeral of their parents. Especially if that dating experience was largely negative.

I agree with Eskie. I don’t see how he made a decision for you. He didn’t ask you to come or even to call him, he just responded to your initiative. But even if he did invite you, it’s not making decisions. You can make your own decision here. Cutting ties is probably the best