Trying to officially get over and move on from my ex

Honestly it’s like a fresh wound opened up again. I thought I’m over him completely but then a wave of depression hits me yesterday and I started missing him, I thought of all the good times I’ve had with him and the connection that we had and how we clicked, I missed all that. I haven’t felt like that in a month, it just hurts so much, I know there’s only that super small chance they feel the same way but their actions contradict that. They betrayed me, hurt me and should be held accountable for their actions, they’re manipulative and a gaslighter ;( I can’t believe I still have some feelings and care for them, they most likely have ASPD and I want them to get help so badly, but they probably won’t anyway. Or refuse to even if they are aware that they might have that :/ all of this just takes a toll on me both mentally and physically, having depression is already hard enough and you add heartbreak onto it…