I was once told by a therapist that once i started the journey to emotional wellness to expect to lose people in the process because people don't like change and they don't like when others around them become healthy and/or can't be manipulated anymore.
That has been true to an extent. I haven't lost people per se but the relationships have changed not for the better... however i have found the courage to protect myself better from these people and that has made my life better, easier to live with myself, calmer.

When you begin to build your protective, healthier boundaries you won't lose your empathy for others but you will realise your needs are equally if not more important. Think of it as self care, you need to save yourself before you can save others otherwise you'll drown too.