I'm feeling so lonely

I'm feeling lonely and I need help. I literally only have one friend. Earlier today I thought about putting my brother's shotgun into my mouth and it's scaring me. I already take meds and I was doing so well. But I don't have a job and I'm back home with my parents. I feel like such a failure to them and I've been trying so hard to get a job and I have no one to talk to about any of this. So please help me.