it might have already broken. a majority of girls lose theirs if there involved in a physical activity. most people say that the hymen breaking has nothing to do with sex. if yours hasn't broken yet you might not evn bleed
i knew a girl on my cheerleading squad in high school, and were were stretching and she was in the split position and she couldn't go all the way down, so one of the older girls just pushed her down hard by her shoulders and she went down, but she started bleeding. apparently broke her hymen. so that's one way, it might be painful.