im 23 as well and just told them this year. it actually went better for me than i thought. i wasnt sure what my father would think. so i wrote a letter and gave it to my mother. i had her read it while i was still as home but while i was in the other room. she then told my father. they both already knew or had wondered if i were gay. so im sure your parents deep down already knew as well. hope this helps!