What happened to us?

I don't know what happened to us, we used to fall asleep on the phone to each other and spend ours with each other and never get bored. I could tell him anything and he would care so much and listen so carefully. He used to only have to say a word to me to make me happy but now I haven't spoken to him in a good few hours, I have so much I want to tell him but he doesn't want to speak to me so I don't want to text him or call him. He doesn't care anymore but I do. I've been seeing a lot less of him and speaking him less too. I miss him so much and I just want him to say n'night to me and that he loves me but he won't. I don't know what to do, I love him so much but is this even healthy?