Fanny.. they are jealous.. im 38 and i personally dont think i look it, and ask anyone im in SOCIAL chat with i certainly dont act it..i am a mom of 3 and enjoy doing things they do, sports, rollerblading, even video games. life is short, enjoy whatever makes you happy and smile. i know i feel like a million bucks when i do. shame on them for ridculing you..on what makes you happy.
and if they still give you a hard time tell them to keep their negativity to themselves.

goodluck and keep enjoying what you love to do.

take care Vee