Can someone help me, or just talk to me

Hey, I don't know what to do.

I've been in therapy for a while. Last year I was in deep depression, I had panic attacks very frequently and ended up hurting myself a lot because of my mental state. I received my diagnoses and since I started taking the medication I've been feeling better, But recently my bad behaviors and habits have returned, and I don't know what to do. I don't have the courage to tell anyone; I still think it's too early to say I'm feeling depressed again. I've just been feeling very lonely lately, my friends are in college and busy with work, but I'm stuck at home for now, only leaving to go to school.

I don't know what to do, I feel frustrated all the time with everything: with my life, with what I create and with what I fail to create, with my friends and family. I love creating stories, but it seems pointless to do so when no one seems to genuinely care for example. I'm still a teenager, I shouldn't feel this way. I finally have a perspective on the future after a long time without seeing it as a possibility because of my depression, but it's starting to get cloudy again.

I would just like to talk to someone with more experience than me, someone older who has already been through something like this?