I am hurting a person with my inability to communicate. I DON'T WANT TO MAKE THINGS WORSE

My recent post was about me not being able to respond to someone who wanted to actually be some kind of friend to me. Yeah,now I saw 6 messages from them and I realised how much I am probably hurting them. They are wondering if I am even alive. I AM but BARELY. I went into the same ugly spiral,but I don't want to make them feel worse knowing that I am not doing good. They struggle with mental health too,i don't want to make it worse for them.

I don't know how to explain things. I don't want to send any depressing stuff but AGH. I'm scared chat. I should die. If I even responded.. what would I say next?What would they say?They would be probably curious why did I dropped out from school. Hell,I don't even want to think about how much time did they spent wondering if I am even alive.