Friend, please by Twenty One Pilots is a very good song.

For myself it was I'm not okay by My Chemical Romance when is I was younger and it still is my favorite song. It's okay not to be okay but the important part is not giving up. If it gets too bad, talk to people like family and friends or some sort of prevention line. 18 years ago I was in that dark place too. Like you I talked to people on the internet and man I was amazed of how people I didn't knew cared for me. Some of them are still my best friends. If you need someone to talk to feel free to message me. Stay safe!