Is volume button stuck? How is it booting into safe mode by itself? Have you tried booting into recovery mode and selecting power off then try rebooting? What were you doing previously before it booted into safe mode?
I can see how this issue can be problematic. I recommend that you try these steps here.
Turn off safe mode
- Press and hold the Power key.
- Tap Restart > Restart.
- The device will restart in standard mode and you can resume normal use.