Infidelity & Domestic Abuse/Domestic Violence

I've asked this question before & its weighing heavily on me again.

I know my relationship was extremely abusive & not just because of his acts of infidelity. Even if he was faithful, I still know the relationship was abusive for other reasons I won't get into right now.

But in talking to my therapist & doing research, I have realized that infidelity on its own is also an act of emotional abuse.

What are your thoughts on this? And how are you coping or coming to terms with the fact that your relationship was abusive? That someone you love could be so cruel?

It breaks me every single day. All of it. Its too much sometimes. I wish I could just shut my brain off. I feel like I need to go to a deserted island & sleep for weeks, alone.