Unpopular opinion: I don't think your life has to have a purpose, or you a grand ambition; I think it's okay to just wander through life finding interesting things until you die
bro to bro: if you like skinnier girls, get yourself a skinny girl. if you like thicker girls, get yourself a thick girl. if you like fitness girls, get yourself a fit girl. you are entitled to your own preferences.
but what you are not going to do bro, is date a girl who is not your type and make her feel inferior to other girls.