I'm 18 years old and I've never even texted girls, let alone anything more. I do have daily contact with them since I'm in a class with 25 girls, so socializing isn’t a problem. I know about texting and all the inner game etc But I don’t know how to build social proof in a way that makes girls naturally interested in me. I never get someone to tell me hey this girl likes you etc. I'm even lifting and i look kinda decent im not fat or anything so idk is my face the problem?

Should I just improve my Instagram with good pictures and start spam following girls, or is there a better way?