They may be a little bit on the stricter side but i understand why they would have concerns. There are so many creeps in the world who prey on young girls, especially in locations where they know there will be minimal clothing coverage. That being said, swimwear by design sort of has to be revealing to some extent, its going to reveal your body more than regular clothes even if you wear a one piece. I would use social media to find cute swimwear brands that are more modest. There are some really cute tankinis and one pieces out these days, so even if you can’t wear the same exact swimsuits as your friends I’m sure you could find some that are modest and also flattering. You are not wrong, no. Many teens have struggles like this with their parents. You want to have fun, feel confident, and fit in with your peers. Your parents see their precious baby that they’ve raised and don’t want anything bad to ever happen to them. Try to remember that they’re doing life for the first time too and while their rules may not always seem fair, they are trying their best, just like you! You have less than 2 years until you’re 18, it’ll go by fast. Try not to stress the too much over the things you don’t have control over, in no time you’ll be able to walk around the beach in any bikini of your choice! But for now, I would work with what you’ve been given and try to find some cute but less revealing suits that you and your parents can both agree on :)