How do I fix my safari

See these Apple Support Topics for detailed advice:

If Safari is slow, stops responding, quits unexpectedly, or has other issues - Apple Support

If Safari doesn't load a page or webpage items are missing - Apple Support

Safari for Mac: If Safari can’t open a website

Also, be sure you are not using any /anti-Virus application which can cause this.

If you run/post the Etrecheck report below someone can check if an anti-virus program is running.

Try setting up another admin user account to see if the same problem continues. Also try the Safe Mode.

Isolating an issue by using another user account

Safe Mode - About

Safe Mode Startup – El Capitan. also Sierra

If it works in the Safe Mode, try running this program when booted normally and then copy and paste the output in a reply. The program was created by Etresoft, a frequent contributor. Please use copy and paste as screen shots can be hard to read. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown.

Etrecheck – System Information

If you are you would have installed it. Look in your Applications folder.

If you run/post the Etrecheck report below someone can check if an anti-virus program is running.