Regret on wrong actions

I am asking this personal question because I am recently found myself in a situation that shook me up quite a bit and I can’t seem to figure out how to deal with it. I made a wrong decision which hurt someone, because I betrayed and broke the trust of that person. I am a very compassionate person and I aim to do no harm to anyone , ever. So consciously putting myself in this situation was probably the worst thing I have ever done simply because I hurt someone. I deeply regret my decision because I was acting out of delusion and ignorance. And I take 100% responsibility for what I did, knowing it was wrong. I try to see the necessity in the action itself (I hope this makes sense, I do not mean it was right and this is not an excuse) as it helped me personally to overcome the delusions and break attachment, only through this I was able to see clear, but I deeply regret hurting someone else’s feelings with it and doing wrong towards that person. I often see teachings on how to overcome betrayal if you are the one getting betrayed - but how can you restore your karma and move on after being the one who betrayed and breaking the trust? And I am not talking about seeking forgiveness from that person, because that is something I simply can not expect as I take responsibility for my actions. I feel like it had to happen in order for me to be able to move on and overcome certain things I was so attached to, and I do not ever in my life want anything like this to happen again, and I make sure it won’t, but it still is haunting and torturing me that I did harm to someone and created such bad karma. So how can I restore it and let go of the fact that I did harm? Thank you in advance for your answers.