I almost got in a fight during 3rd period

During 3rd period at school today,I was talking to my teacher about some extra credit work and as soon as I turned around,the kid that sat behind me took my sunglasses,as soon as I saw that,I bolted over to my desk and got in his face about it,he kept trying to play keep away cause I took his backpack from him,I told him to give them back to me and he’ll get his stuff back.

Well,I got them back but thanks to a girl that couldn’t stand seeing the scene. I went back to the teacher and continued my conversation with him,the kid kept on talking tough. When I went back to my desk to sit down,he tried to provoke me to fight him,and started insulting me,so I got up and took my stuff with me and sat with a friend of mine,he kept on with the name calling. Minutes later after I started to calm down,she knew I wanted to go off on him,one of his friends came over and I knew he was going to try to talk me into fighting him,but I told him to walk away.

I told my friends he wasn’t worth my time and wasn’t worth getting suspended over. Question is,what do I do tomorrow,I sit in front of him and I know he’s going to try and pick a fight with me.

Sorry for the long explanation,I couldn’t make it any shorter.