I dont know what to do?please help?

You are right, there are more fish in the sea. However, if you really like him, then go for it. You are only in high school. You have the rest of your life if this relationship does not work out. For now, you should just have fun! Tell him how you feel. Just tell him you would like to hang out and have fun together, dont scare him with a relationship right off the bat. But, you are young and entitled to have fun, so do it!!