By "vilolent rape comics" I take it you mean cartoon sketches. The fact that you are addicted to them is a little worrying but at least there not pictures of real people. May i suggest that you try some "normal/classic" stuff next time? as looking at comics where people rape girls is a little bit sick.
As for the thinking/worrying that you are homosexual I would dismiss this totally the reason you search for gay porn is that you are curious and being curious does not make you gay
you say yourself that you find the idea of anal sex gross so doesn't that sort of answer your question?