I always think similar to that, what're people thinking, being judged, having insecurities, but in the end, it doesn't matter what you do, they're will always be people judging you sometime in your life. Having that in my mind makes me care less for what others think. If you like a guy, talk to him. "The first step is always the hardest, but it's the only way to reach the second step." Talk to him, talk to him, talk to him, everyday, every chance you get, make him notice you. The hardest part of that would be if you guys are in the different friend groups I know that might make you out of your comfort zone because you're worried what his friends are gonna think, people are gonna say, but do what your heart tells you. Whats the worst that could happen? Him rejecting you? There's plenty of fish in the sea, I'm sure you'll find the man of your dreams sooner or later.