hard-heartedness

Q: How do I deal with a hard heart? I'm finding it hard to repent from major sins. I feel no guilt and no fear what can I do? I'm always concerned with worldly matters how can I focus on the akhira? What is my intention supposed to be for practising and how can I make my actions sincere as I am a show off and anything I do in religion I always seem to think about pleasing other Muslims so they can accept me. I know I'm a hypocrite but how can I change it when it happens automatically? I always feel like I'm against Allah and looking for other religions even thought I know Islam is right, like my heart won't accept it and I feel a lot of evil inside of me I don't know how to deal with it. I also have a lot of bad thoughts and am full of arrogance I'm constantly swearing in my head and have bad feelings towards Allah. I stay away from Muslims to stop the insincerity but even in private I'm always thinking about them. I know a lot of it is the effects of sinning but how can I repent when I feel no remorse and I feel like I'm lying and trying to trick Allah. Any advise would be appreciated.