Bravo decided to combine “Gossip Girl” and “The Real Housewives of New York City,” and the result is “NYC Prep.” On this reality show, which premieres June 23, cameras will follow five wealthy teens as they navigate Manhattan’s social scene, shop, apply for college, and work on charity events. They lead lives unfamiliar to most New York kids — or adults, for that matter — despite Bravo’s claims to the contrary. What will be familiar to you are the I’m-not-in-the-cool-crowd feeling you had in high school because your parents didn’t consider how their features would mesh into one face and didn’t see fit to replace your silver spoon with a Black AmEx. “Gossip Girl” is fun because it’s fiction, and the characters, although teens, deal with adult issues. I don’t think “Gossip Girl” would have been a success if we had to watch Jenny Humphrey sketching and sewing her designs or Blair Waldorf filling out her Yale application. “The Real Housewives” is entertaining because it provides all the fun of gossiping without the guilt. “NYC Prep” will have to bridge the gap between making teen life entertaining to adults and ensuring the kids don’t become too adult-like in order for this show to be successful. And Bravo has to get these kids to stop ending every statement with an inflec-tion?