Being a teenager is hard enough and at 15 you are already unsure of yourself and subconscience of everything, but being a teen with CF is even harder. I personally think it is harder for a boy, but thats my opinion. It is very hard to tell people about CF because the fear of being treated different or being rejected. I was a teen not that long ago myself and I remember I was scared to tewll my mom my problems too. What I find really helped is when my mom would call me over and it would be just the two of us and we would be in private so that I wouldn't feel like anyone else was listening. She would then tell me that she wanted to talk to me about how I was doing. I would usually just talk about the gossip around school otr a movie I saw and we would chat like that. She then would ask me about my disease. She would ask me how I felt about it. I was always resistant because it is hard to just start taliing about it. She wouldn't pry, but would say stuff like whats the worst/best thing about CF. She would say sometimes I am scared when you don't do your treatments and I just want you to take care of yourself because I want you to outlive me...it took a long time for me to open up and nopt roll my eyes and pretend like I didn't care. Eventually I would start coming to her and talking to her. I would cry about problems and she would talk them throgh with me. It may be different because I am a girl and we seem to be a little more open, but your son may surprsie you. To this day I find it much easier when my mother is the one to bring it. If you can't get your son to open up don't feel bad!!! Being a teen you are sooo confused and a psychologist may be the best way to go. As I get older I find I turn to my parents much more than when I was a teen! You get out of that "i am cool and have everything figured out and don't need my parents, but in reality i am scared and lost stage" eventually even though it seems to last forever.