Cell Phone Etiquette

When I am with friends we are always on our phones texting because we like to stay connected. Teenagers are no longer capable of going more than 10 minutes without a phone in their possession. I think it is annoying when someone is constantly texting someone else because it makes me feel like I am not there or like I am less important. But I also believe that it is acceptable to answer a text every now and then while you are with a friend. It is hard to stay off your phone completely for a long period of time so answering messages is okay, but constant texting is just rude and annoying. It is disrespectful to the people you are with.