No, do not get cut. Do not get cut. Please! I also have phimosis and I am almost 18 years old.
Step 1: the first thing to try is natural retraction. Buy some kind of lube and lube up your foreskin. Peel the skin over the head (while flaccid) and hold it for about 3 minutes. Repeat this doing it about 9 minutes total. Then, put your index finger, pointing to your belly button, touching the head of your penis, skin retracted. Let the skin fold over the finger, and keep it at the point where it is stretching the most. (usually the middle of the head) you will see a whiteish stretch line on the foreskin. Do this twice a day for 30 days, if that does not work...
Step 2: as someone else said, buy the lotion. You can get it from your doctor and apparently this works in over 80% of phimosis cases.
Step 3: speak to your doctor of any other possibilities
step 4: something like 7 in 1000 people, after trying all these techniques, need circumcision. I doubt you or I are in this rare % of people, so try all this stuff.
Goodluck, I am currently in stage 1.
Goodluck again my friend, do not resort to gettin cut unless necessary. There are other ways. Goodbye.