wow this looks exatly like me, like exatly.. i'm 18 and have had these since i was about 14 or so.. i was always optomistic that they would go away because I had heard that about 90% do dissapear that occur from puberty.. but so far they haven't. I have a hard lump uner each nipple, when i pinch them or they get cold they will get tighter and look pretty normal, barely noticable at all, but that only lasts a minute.
I hate taking my shirt off in public, even though i go swimming a lot in the summer i always pinch them before i get out of the water or take my shirt off to get in.
Many people on here have much worse cases, and think that what we have is nothing.. but at least for me it has been a constant embarrasement, i worry about them all the time, and always look down at my chest and re-adjust my shirt to try and hide them.
I know exatly what your going through man.