I just don’t want to be sad anymore

One day I woke up and took a look at my life and I realized how much I hated it. One random day I just stopped being happy, at first I had so many passions and interests. I wanted to have a career and loved learning about it and learning in general. I’m 15 and for about 3 months now I’ve lost my passion in anything and everything I care about, I dropped a whole 1k on a fucking guitar and I can’t even bring myself to practice it. And then there’s art which I’ve devoted myself to for a whole year and I still draw worse then the girl I liked in 4th grade. I’ve started taking sleeping pills so I don’t have to lay awake at night thinking anymore. At first I didn’t need them but now I can’t sleep without them. One night I decided not to take one and I had the worst realization in my life. I laid awake sobbing for 30 minutes at least holding my pillow out of loneliness. I just wanted anyone to love me, to talk to. I was so desperate for anything. My life’s on a downward spiral, I’ve given up on school from a straight A student to barely passing and all my hobbies i once had are now gone along with any passion for them. I wasn’t worried about killing myself because I’m too much of a coward but lately it’s begun to look a lot closer then I thought. I’ll randomly have depressive episodes throughout the day which bums everyone out around me and stops whatever I was doing while I rant or moan about some mild inconvenience. I’m so tired of life already and it hasn’t even begun. I doubt I could live another year let alone 40. Is there anyway I can make it stop? I’ll take anything at this point as long as I can stop feeling this way (Sorry for the rant mixed with a question) (TLDR) I’ve lost passion for everything I ever cared about and Im tired of being sad and lonely how do I make it stop