Come back

I miss my friend. We use to be so close. I don't know what happened? We use to tell everything to each other and now we rarely say a word to each other. I see him everyday in school, but he always turns his head a different way. He always smiles at me everytime we see each other but now, we hardly have an eye to eye contact. I try to talk to him, but he won't listen. I don't have an idea why he would act this way towards me. I haven't done anything to him to make him act like this and I'm pretty sure I've done nothing wrong to deserve this treatment. I just want everything to be back as normal. Where we talk, laugh and act like friends.