Compassion and Empathy

Michael McCord: Compassion and Empathy, the difference between these two (compassion involves empathy but also brings in the element of action/no action as a decision) and how do concepts like “tough love” fit into and or work with these fundamental elements of practice? As a cornerstone of Buddhist practice (compassion cultivation) how do we set good/healthy boundaries while not veering into ruinous empathy or cold hearted disassociation from another’s struggle?