Hi Mary,
I saw your e-mail last night, you said that you felt very lonely in your new school. I understand it is not easy to move to a new environment and start all over again. You need to give youself sometime to adjust and adapt to the new environment.
You are good in basketball and science, did you join the basketball or science club in your new school? In that way, it will be easier for you to make friends through sports or while doing experiments because you have the same interest as them. You are an easy- going guy, just that you are just a little shy initially. Give your classmate a smile and a nod, if they replied, you can start introducing yourself.