Am I losing my mind?

Either I laugh over thing or cry over everything.I have been broken up with guy for a mnth now and 2 weeks and I cant come to terms thats it over.We ride the bus together and we havent been to school because of snow.Just last week ,we started sitting together again on the bus, even though we are broken up.We had to break up because of my mom, so we were still friends.But , last friday morning on our way to school he barely spoke a word to me except to ask me, how was my night, you just dont how I felt about him , it killed me that we had to break up.Kayla this other girl on the bus has liked him since last year, she still likes him. Last wednesday she started talking to him while I was right beside him.She captured his whole attention, i just felt forgotten.So I stopped sitting with him aand talking to him but i cant get him out of my mind, have you ever been in this situation, if so, what did you do?