
I’m a 5’5 guy but I haven’t earnestly tired approached. But I have been approached a couple of times (not all is lost !). As a math grad student I’ve noticed that one helpful method is to struggle with and attempt problems that are way beyond your ability to solve. Likewise you can try to approach girls you think you have no shot with, inure to rejection and build confidence
It’s a bit paradoxical unfortunately because shorter guys can be wonderful but their insecurities about being short tends to ruin their personalities, especially if they assume any rejection is due to their height. Try not to let it get to you which i know is tough advice but that’s really all you can do (source: my bf is 5’6)
Your confidence shouldn’t only come from your appearance but who you are as a person. Focus on your personality, work ethic, hobbies, going out to events and exploring different environments to thrive in, etc. You can even learn how to communicate better with people and being clever but respectful with flirting with women you find interest in.