Are avoidants even capable of taking accountability?

Me and my ex broke up for good a few days ago. Throughout our entire relationship I’ve realized how mentally exhausted I’ve been. He never wanted to understand how I felt about anything, and when it came to talking about my boundaries it was like I was talking to a wall. We argued and he told me to go away and never come back, so I tried my absolute hardest to leave him alone and I ended up leaving him alone for 3 days. Even tho he’s the reason for our breakup, I still broke no contact and went to apologize to try and fix things between us. He said no and proceeded to tell me he doesn’t love me anymore, saying that I was gone and I need to “keep that same energy” basically being petty because I did what he told me to do. We haven’t talked, and now I’m just wondering if he even cares… does he even miss me? Does he realize the things he said to me hurt me? I don’t know. It’s gonna take me so long to heal from this, and I wish I knew how he truly felt.