He ruined my life

Ok so I dated this guy like 4 years ago, then he left me in ( probably) the worst way possible. After that, I became depressed and missed the school year. This happened next years too, so long I've lost 4 years. I got diagnosed w depression, anxiety, which triggered to develop a tda, an eating disorder, a brain failure non-receptive disease and several heart problems from the stress it put me on. Now, he started talking to me again, and he doesn't know abt any of these, I am feeling truly helpless against my emotional dependance from him while I slowly feel and notice how my body is becoming weak and getting sicker each second.