If you don't want your Gmail address and emails anymore, you can remove them from your Google Account. Deleting them won't delete your entire Google Account.

Will deleting Google Account Delete Gmail?

Your Google Account won't be deleted; only your Gmail service will be removed.

What happens if you delete Google?

You'll lose all the data and content in that account, like emails, files, calendars, and photos. You won't be able to use Google services where you sign in with that account, like Gmail, Drive, Calendar, or Play.