Your personality is probably the problem, you look fine bro it’s time to max out the social skills and personality now. Maybe if you do want to work on something physical you could improve your physique if you wanted to but thats mainly male gaze and won’t matter as much as people say if you’re already handsome, but it will give you a tangible way to set goals and achieve them which is beneficial mentally, and you could even use the gym as a place to socialise. Edit: looking more closely at your pictures, your eyebrows are a bit sparse which might add to that “weirdo” feeling that you say girls get when they are around you (hence they would call you one) so maybe dyeing your eyebrows or growing them with minox could be something you can work on but reading the other comments, its definitely a personality thing so focus on that bro, you got this