“Instead, be kind to each other, tenderhearted, forgiving one another, just as God through Christ has forgiven you.” Ephesians 4:32
After going through a toxic relationship, the hardest thing to do is to forgive and be kind to the very person that have hurt you. But you must remember that forgiving is not for the other person, it is for you. Choosing to forgive is choosing free yourself and begin your healing process. How you began to heal is through first say your peace with kinds and in truth. This allows you to externalize your emotion and free yourself of the burden of having to carry this baggage to future relationships. Often, we tend to mask our emotions by internalizing how truly hurt we are by trying to prove to others around us that we are strong, and we can move on without consequences. But, in most cases these emotions resurface in other relationships and situations through toxic behaviors where we act out in unkind ways.
If you or someone you know have gone through this situation, you can probably identify with the roller coaster of emotion and the struggle to forgive and be kind when you are hurting deeply inside. My advice, talk to someone, sort out these emotions and feeling and find your peace so that you can be the best you.