Literally every medical classification nowadays:

-Do you abuse actual children or watch CSAM materials involving real children? -Do you feel bad about who you are?

If the answer to both is no, congrats, you’re healthy and it’s just a sexuality quirk, do whatever you want, fap to all the lolis you want for all we care

Look up ICD-11, DSM-V or whatever is relevant to your area - they’re pretty much all on the same page here.