I feel so alone

It just feels like shit right now. I spend most of my time talking to myself and peolle I make in my head just to continue living. I don't have any close relationships anymore and every interaction I have with anyone feels meaningless. I don't get messages on my phone anymore, I just sit scrolling through reddit in class. I'm laying in my bed right now just doing nothing because nothing I do is enjoyable. I just want anyone in my life to ask me if I'm okay or talk to me. I just want someone to tell me it will be okay or comfort me but there isn't anyone anymore. So many things in my life cause me pain and hurt and no one really knows or cares. I just keep going knowing it's all gonna collapse one day and I'll be gone. I just want to go back to when I was happy So I can live without the constant pain in my head.