I can totally understand you. i am 17 years old and have a birthmark on my whole left leg. i too havent gone swimming since forever! my parents dont know about my self-consciousness even tho i wear jeans all the time. i know my friends will accept me still even tho i have it, but i still can't bear to show them or talk about it. most of my friends don't even know about my birthmark. i also want to get rid of mine, but i dont think my parents would allow it and i also wouldnt want to hide it from them if i did. i hope you and your boyfriend are doing well. he will accept you no matter what because he loves you. hope we will both gain self confidence.