How do I tell my crush I like him? What If he says no. I'm stuck and he is always with his friends only sometimes he is alone. Help please!!!!

I like animals and I like to explore nature. I also like to ride my bike and play with my dog. My avatar is not my dog but it is a cute dog from the web. I also love to read the book warriors and that is about cats if you haven't herd it before. You guys are awesome and thanks for following me. I also like to help in school. It is every Monday to Friday so I will probably be on here for that time