Getting saved is the most important thing you could ever do. And once you are saved, there is nothing and no one that can ever take that away.
But being saved is about more than just the forgiveness of your sins and getting out of hell. You are a new person now. In fact, Galations2:20 says “it is no longer I who live, but Christ who lives in me.” How does that change what you say ... what you think about ... how you act towards other people? If Christ lives in you and you live for Christ, doesn’t that change everything?