I completely understand and much of the time, I feel the same way. However, I try not to answer my phone if I am talking with someone or otherwise engaged. I carry my cellphone everywhere I go - everywhere! I started when Gary got sick 5 years ago. I had to be accessible to him, since he was home and I was at work. I always answer a call from him, no matter what I am doing. I do not always answer everyone else.
But I hear your pain, my granddaughter is the same way, phone in hand all the time. Over spring break she told me she has sent/received 2000 text messages - I nearly died!
I guess I have a love/hate relationship with my phone - I love it because Gary can always contact me - I hate it because everyone else can always contact me.