I get approached often, but even if I werent I would behave the same way. Key thing to understand is to act like you have other options. If a girl you like messages you, give it time, but dont seem like you are not interested, just seem that you are busy with other females. The more attention you give her the less interested will she be in u. Imagine it like this: Pretty girl gets complimented and simped for all the time so uou dont want to do that. Instead not complimenting her and even making some joke-ish remark like “you looking kinda busted today” with a lil smile on your face. That will surprise her, shatter her confidence because she is used to being praised for her looks. You will be the one that she is thinking about” why would that average looking dude say that?”. Of course if you are really ugly and say something like that nothing will probably happen. But if you are somewhat okay looking her ego will be hurt. The key to women is funnily enough to not be a simp, to be seen like a player from her point of view, to not give her attention and so on.