Should i just walk right up to him and beat him up?

It all started last weekend. First he twaps me so i go to hit him back but he blocks it so i miss. Then he punches me in the chin and it didn't hurt cause we were messing around so i punch him with my left hand and im right handed under the eye And not even hard. He gets mad and his eyes started to water and then he punches me in the nose, but it didn't hurt and walks away. He told my friend he wants to fight me and he was going to come up behind me and sucker punch me. He called me tje next day about fighting, and was talking sh*t but i was busy that day so i couldnt. The day after that i was a a party and he calls me and wa ted me to meet him but he put 2 older kids on the phone to so he was probably gonna jump me and i was drinking so i didn't want to fight him while i was drunk. He talks so much sh*t on me to other people about me in school and sayas im a p*ssy and a b* tch but never says it to my face when i walk past him in the hall. Sometimes he'll ride his dirt bike and he came outside my house talking tonmy brother but didnt call me out to fight. He sits in the back and i sit in the front of the bus in the moning and this morning when i got on he yelled p*ssy when i got on. I just looke at him and sat down and the bus driver just stared at him. Tomorrow i was thinking about just walking back to him and beat the sh*t out of him right there if he yells something to me tomorrow. What should i do?