Don't be afraid to be yourself, in fact I had the same problem, I kept it a secret for 2 or 3 until I spilled my guts to a friend in private, I recommend you tell your closest friend when you feel the time is right. Take it from me yiff is not something you want to get into, it can make your life terrible, worrying about if your parents will catch you looking at it. My parents finally found some of the yiff stuff and it was not pretty, I felt like crap for a few days, I couldn't even look my dad in the eye.