Do I have Gynocomastia?....and what non-sergical options do i have to get rid of it?

Ever since I was 13...I have had this large, hard bumby mass on both by chest muscles ...it looks like 'man breasts' as most ppl say..I am now 20 yrs old and they still have not gone..I have noticed that when I exercise alot...for example I run on the treadmill with an elastic strap around my chest..after some time of exercising ..about 2-3 months..my chest does get smaller and so does the fatty mass...but i have to do really strenuous exercise to make my chest smaller....the 'man breast' look is very noticable when my skin is warm...but when im cold...I get goosebumps and my skin goes tight and its less noticable...im not sure if its Gynocomastia...but if it is?..is there a non sergical method to help significantly reduce the side of my chest...please help...I have been wearing jackets and big clothes to hide my body...its starting to get to me after all these yrs