 I don't believe you can lose your salvation. Some people do. But even more important than that is, do you actually have salvation? Here's two things that you can do to check and see if you actually are a believer. Number one, do you testify? Do you witness? Do you magnify Jesus? The Bible says when Jesus was speaking to the disciples, He says that the Spirit of Truth will want to testify of Jesus. So do you ever at any point in time take the opportunity to magnify or to witness or to glorify Jesus in public? The second thing, we are required to repent of our sins. To repent means to turn around and to think differently about sin. Does sin grieve you? Your sin or anyone else's sin? If it does not bother you, if you can sin and have it not bother you, coupled with the fact that you do not share the Gospel or at least testify or witness of Christ, then that's a good indication that you might not be saved. If you're not, then take this opportunity to place your faith in Christ and make sure that you are in His Kingdom forever. Amen.