Whenever I'm watching or reading something with people in an opposite sex relationship (or even with real people), I have a hard time identifying with them, at least unless I make a specific effort to. My initial impression is usually that their relationship is just superficial/not real/they don't really love each other like my girlfriend and I do. I have to sort of mentally pretend that one of them is the other sex (not literally but I don't quite know how to explain it) to 'get it' that even though the situation is different, their feelings are the same. And I don't have this problem with gay guys, just straight people. In a way I guess it's like the idea of having feelings for someone of the opposite sex is so entirely foreign to me that I almost find it hard to comprehend? I'm not totally sure how to explain but hopefully this makes some sense.

Has anyone else ever felt like this? I feel like it makes me a bad person but I don't know how to stop.