Gynecomastia Surgery Question?

Okay, so I’m 16 and have had Gynecomastia for about a year. It is really upsetting and is definitely starting to ruin my life.

I can’t go swimming with my friends or take my shirt off anywhere, I am especially worried about what will happen if I take my shirt off in front of a girlfriend.It doesn’t help that my brother makes fun of me for it and points it out to everyone who he thinks will look.

Do you have to be awake for the surgery?
Does the incision hurt?
Is the surgery worth it?
If its a “lipo” surgery, do they have to cut your nipple open?