DEAR ABBY: I am a 16-year-old girl in a somewhat happy relationship. When I first started dating my boyfriend, he was all about it, as was I. But now it seems like he’s only interested in sex. He’s always asking me to send him videos and pictures of myself nude, and I just keep telling him I’m not ready for anything like that. I also don’t think he is understanding my comfort zone about the topic of us having sex. I have told my friends. They say I’m in an unhealthy relationship because he might pressure me into something I ...