I am non-binary, however I was quite envious of some of girl's activities, but not others. I liked sewing and cooking, but I also liked working on the car with my dad. I got teased and picked on for liking sewing and cooking, and playing with dolls (I had GI Joes and my sister had Barbies, and they reguarly had "get-togethers", lol). Sadly, I let peer pressure get to me and I began pretending to dislike these things so I wouldn't get picked on so much. I couldn't get out of cooking (my mother was insistant that I learn this skill) but I got out of learning more sewing, or continuing to play the flute (because, that was too girly and got me picked on too). In retrospect I wish I'd have told everyone to go **** themselves and continued doing what I enjoyed. It's taken me a lot of effort to go back and relearn some of these things, sewing in particular. I now do garment work and quilting in both fabric and leather, and I'm very proud of this! I also cook like no-one's business!
As I grew older and began puberty, and watched my afab peers changing as well, I grew rather envious of their developments. I wished I looked more like them, and less like a boy. I grew especially envious of my sister as she grew older because she was a tomboy and switched back and forth between "boy-mode" and "girl-mode" with seeming ease. An ability I wished I had.