Since anyone who has been deeply wounded psychologically holds a chance of becoming a narcissist, it will be a tough time for the empath to come out of the break-up.
To avoid these damages, the empath should learn to bring a balance in their lives. They should know where to draw the line. Loving and protecting is good but the empath should know how they are doing it and if at all their actions are logical.
If they feel they need to go out of their ways to please the narcissist, the empath should come out of the relationship before it’s too late.
They should not allow the toxicity of the relationship to affect them. The empath is strong and sensitive. They just need to take the right decisions without getting moved out of sympathy and love.
We cannot fix everyone. Sometimes, it’s better to let go.