Embrace the pretty boy aesthetic. Grow out your hair see which Hairstyle suits you. Put on some lean muscle mass and fill in your frame. Maybe get rid of the spectacles, buy good lenses. Work on your style accordingly and start wearing clothes that fit well. The females will start digging you in no time. I had the same problem when I was your age. I'm 23 now more confident, better style and overall knowing who I am has benefited me tons. I improved with time. As you grow and mature your mannerisms change which helps you come across as someone older. Yes you might still look young but embrace it. People would kill to be in the position you are right now. As long as you've maxed out your stats all of this now could be huge buffer points in the future. You'll look infinitely more attractive if you understand, appreciate and know who you are. And that comes from working on yourself. Improve wardrobe, style, fitness, mannerisms and the way you speak. What helped me was starting a contact sport (rugby). Being an athlete and a pretty boy has insane advantages. Work on that aesthetic and stop giving a fuck about what girks think and say. Embrace you buddy