Why did i do it I feel guilty for taking my shirt off?!?

okay so me and my bf have been togeather for like 2 yrz and im now 17 and he told me to take my shirt off for him and i did and he well he started to play wif me and now i feel like i did somthing really bad and i think he enjoyed it wud should i do..was wud i did normal ( i had dry after)