checking break on one side doesn't mean other side aren't worn out. You have to check all four break pad. Most of the cars that came to my work shop has one side break pad are thick while other side break pad inside one are worm out. So i suggest you took your car to any mechanic shop and ask them to do a break check.
Usually when you hear a brakes grinding, it because your break pad are worm out. If you want to make sure ask your bf to check all the break pad (inside, outside).
Hope this help.
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