As a teenager I masturbate about twice a day. I'm worried this is too much and I'm addicted. A lot of times the urge comes spontaneously and won't go away. If it is too much than how much is normal?
Twice a day is fine. Do you prioritize masturbation over your daily duties, like studying or going out with friends? If this habit isn't interfering negatively with your life, then it is ok. There are people who do it more than twice a day and aren't addicted, and, in your age, it is quite normal to do it more frequently. Things start to get problematic if you totally forget about other things you need to do just because of masturbation.
Yeah, as long as it isn't interfering with your everyday activities or social life, you should be fine. Two times a day definitely isn't too much.