So you can have notifications on here but email off. It sounds like you might have disabled notifications entirely, rather than adjusted your email preferences? There’s no way to see likes outside of the notification system.
You can check to see if notifications are being generated at all by going to your profile:
Click on the M in the circle in the upper right
Then your user name
Then preferences
Then in the drop-down that shows “preferences” select “notifications”
This should be a list of notifications. Do you see likes there? I don’t know if they’re even generated if you have them turned off.
If there’s nothing there, you’ll need to turn notifications back on.
Go back up to that drop down and select “preferences”
Then in the drop down directly to the right that says “account” select “notifications”
You’ll want to adjust the “notify when liked” option
Then turn off email notification
Go back up to the drop down on the right that is now on “notifications”
And select “emails”
And set these to “never”