My boyfriend and I don't show our relationship at school?

I'm glad that you don't show your relationship like that at school, it's inappropriate. You and your boyfriend sound like you have a good thing going so don't let your friends ruin it for you. I think that you should just tell them what you said here, that you do show your affection for eachother outside of school and that's how you like it. Tell them to stop interfering because it's very stressful. They're your friends, they'll understand.