Having a difficult time letting go of sadness and resentment towards my brother and sister!

Hi. This is a very difficult situation for me. My boyfriend spent 26 years in prison. He’s been out for 13 years and we’ve been together 6 1/2 years. My brother was a police officer when I met my boyfriend and now is a detective. He cut me out of his life and my nephews lives 6 1/2 years ago when he found out about my boyfriend. I had a very difficult time with with his choices but thought he was being a bully and controlling and instead of getting to know my boyfriend, he gave me an ultimatum. My sister gave my boyfriend a chance about 5 years ago and due to some recent events and a huge misunderstanding, she will no longer allow him in her house. There’s more to the story but I won’t get into it. Bottom line is, my boyfriend is an exceptional human being and has stood by my side through so much in the last 6 1/2 years. I am having such a difficult time with an IM for this because I’m not able to release my feelings of sadness and anger as a result of my thoughts. I would never treat them this way and I’m suffering deeply and I’m so tired of it. I understand where they are coming from but part of me thinks they are judging both of us. Please help. Thank you