Do our deceased loved ones feel regret?

I recently lost my partner and spoke with a medium to connect with him. She told me a lot of things that were very accurate. She also mentioned he was saying sorry, sorry for some many things he would’ve done differently if he had known. I feel like I’m dwelling on this. We had some issues but we loved each other, I love him so much. Do you think what she told me is correct? Have you heard of spirits mentioning things that could’ve been different? Or being sorry for things that happened? My session with the medium brought me a lot of comfort but I’d like to know more.