EXACTLYYY BRO.
first off to stand out from other n**gas u need to sit by yourself sometimes, let girls see you sitting by yourself and they will be able to look at you without being distracted by other n**gas
leave your earbuds out sometimes, girls might feel comfortable walking up to you(might) because when you have them in they might feel like you don't want to be bothered but in reality you're looking for company,
stop looking down, shows low confidence at least look at where you're walking to.