I hate people like the OP who can't do things on their own. So what if they didn't want to eat different food, what was stopping you? Then you they need to grow up when you're the person whining about it. I'm a picky eater, and I tell them exactly that whenever they start their whining. You don't have my tastebuds, so there's no reason you should be telling me what to eat. No, I have not tried every type of food or anything, but I have eaten enough of various types to know that at best I might be able to stomach some of the food and will end up in a bad mood for eating something I did not like. Nine point nine nine times out of ten I will not like the food that people feel the need to force on me, if I wanted that, I would have ordered it. I don't sit there and whine about it, I just plain don't eat (politely say I'm not hungry, or maybe I'll get an appetizer or something), or will eat somewhere else. I don't have a problem doing that if everyone wants to eat somewhere and I don't. I'm "adventurous" enough in other things to make up for my lack of it when it comes to food.
I don't have a problem with people who like trying new foods and things like that (in fact I think its great), its just when they start trying to force their view on me and start whining about it that I have a problem. Once I know someone is one of those people, I do not eat with them.