Am I being too pive/nice?

It's been nine months since a break up of my relationship that lasted almost five years. I have learned that his intentions were to make me feel bad about myself so I could leave two years ago. Instead, I let his non supportive words get to me and went into a diabetic coma. I know have speech problems and walking/standing too long is difficult. When I started standing up for myself he said I was just crazy and could not survive without him. Yes, he has already made is newer relationship public. Am I being too nice by not speaking my truth. His mother and one of his ex's killed themselves and I want to stand up for myself but who will believe me when he has so much wealth. Needless to say I am also concerned for his new relationship... I am lost in my own self worth...