I've done some research on Catholicism online... and I still haven't really found the answer to my question. I figured you all could explain this in a way I can understand.
Catholics are Christians, right? So why is that Catholics seem to be in a separate group? (Ex. other denominations not being able to take communion in a Catholic church, having to have the marriage "approved" by the church for it to be recognized if it was not done in a different church, etc.)
A lot of my friends are Catholic, so I'm just trying to understand. I tried asking one of them, but by what he told me, I don't think he's practicing his faith right now...which kind of concerns me since he's trying to get married next year. But that's another story.
TIA. And I hope this didn't come off rude. I'm genuinely interested.