I hve fibroscan value-5.45,(1.28m/sec).my doc. told me im in a immune tolerant phase of hbv.what does this mean?is this good for future.?

Yes, good.: Your fibroscan is in the mild to no fibrosis range. Immune tolerant phase is usually only in newborns where the virus in present, but non-pathogenic, with normal liver enzymes and no to minimal pathology on liver biopsy. Sometimes it persists into adulthood, like in your case. Most progress to immune-active with liver inflammation during childhood.