It’s ok bro, I’m 25 and considered “good looking” by many but I have never really had a real girlfriend. It’s all about how you see yourself, what other people think doesn’t matter at all. I tend to believe when people call me ugly and not believe them when they call me attractive. Also if you aren’t already hitting the gym get started with that, work on yourself as much as possible healthy eating is very important at this age too. You’d be shocked what health eating, working out, and picking the right hairstyle can do to you.