Safari won’t launch on my mac book pro

Hello, WeeDoll.

Have you applied any software updates (not upgrades) that may be available for your current macOS and/or Safari?

Click Apple menu  > About This Mac > System Update...

If rebooting your Mac doesn’t fix the problem, see if the problem still happens in Safe mode. It takes longer to safe boot so be patient.

How to use safe mode on your Mac - Apple Support 

Safe mode forces the OS to clear certain caches and logs and do other miscellaneous housekeeping. It's non-destructive to user data so is safe to do.  Very often certain weird software behavior is corrected by simply logging in this way as a troubleshooting method. When you're in safe boot, the machine will not be at its best performance, especially with graphics, but that's normal.

Does the problem persist while in Safe mode? 

Exit safe mode by restarting your Mac normally and re-evaluate the issue again after a normal reboot.

You're welcome. I hope it works out. 👍🏽