Avoid riding on roadways. If there is a sidewalk you could ride on nearby, use it. Drivers get a little nervous if they're sharing the roadway with a bicycle. Avoid riding too long without breaks, you can get tired out and unintentionally harm yourself or others. Drink lots of water on the way, and wear helmets at all times, no matter how stupid you think they make you look. :)
Childhood, Society, Media, and Beliefs.
Chronic or long term stress. Hope this was helpful!
Everyday, morning or night, stand in front of the mirror after brushing your teeth and begin to name off everything you like about yourself. Even if it's not much, like you like your hair or your eyes, maybe your fingers? It's something you like about yourself. Your posture is another big thing. If you have a good posture, more people will try to interact with you, because you have a warmer posture now. Perhaps before you seemed a little closed off, but with a better posture, try sitting and standing with your back mostly straight and your head up, and you will have a slight aura of confidence, not so much that it's overbearing and arrogant seeming, but enough to show people that you are happy and confident within yourself. Maybe you value your intelligence more than your looks. Take pride in yourself and you will begin to feel more confident.
To build confidence in others, try giving someone a compliment a day, maybe that kid that doesn't look to have much confidence. Complimenting them on their clothes or perhaps their hair, maybe their shoes, or something. It could make their day and begin to boost their self confidence a little more, and you may even get a friend out of the situation.
If you found this useful, please mark me brainliest! I hope i helped!