Boyfriend reached out to a girl he used to be close friends with

My boyfriend and I met at narcotics anonymous and have been dating a few months. He talks a lot about this girl he was close friends with. That she knew every part of his life and was there for all the trauma and put up with his addiction until crashed her car because he was high and stole $300 from her. She didn't call the cops on him but she cut him off as a friend. I found out today that he reached out to her. To apologize for how he treated her in the past. Telling her he's sober and thanking her for being a huge part of his life. She congratulated him on his sobriety but did tell him she hopes he stays sober and has an amazing life. She isn't interested in being friends anymore and would like to keep that chapter closed and thanked him for the positive he did add in her life. He said he completely understood and that was it. I know I shouldn't be feeling some type of way. I knew about this friend. It's just how much he talked about her. Which I understand. He talks about a lot of people who fucked over and I guess he was the most torn up over her because she was a true friend. I just feel some type of way but I get it's a me problem...

@Amber he was hoping there was a possibility to rekindled their friendship since she was a huge part of his life. He's just respecting that she isn't interested in being friends anymore.