Struggling deeply with this sin

I failed again. I feel like I'm not even a true Christian, I'm a hypocrite. I talk about sin being bad and then I go and do it. I'm losing hope guys. I keep falling into temptation and it seems I just don't care anymore. I start having doubts about the faith as well. Lord have mercy on me, a guilty sinner deserving hellfire. Jesus please help me, I'm sorry. God bless you all.