Sister relationship

My sister and I used to be sort of close. We shared a room until we were 12 and 15.

Once she met her now husband at 16 she changed big time. We have a brother as well and he confirms every thought and feeling I have about her so I know I’m not crazy. We have tried to open up to her and talk to her and she is just so different from us. We have had a tough childhood and even lost a parent when I was 19, she was 22, and he was 24. It was a lot to deal with. I feel like there’s a huge barrier between her and I. When I open up to her about serious things because she’s the only family member I have left (brother is in jail, and dad isn’t in our lives) she just makes me feel so alone. It’s as if she hasn’t even suffered anything in life. It’s like she hasn’t experienced the loss of a parent, the abuse, the abandonment. She seems totally fine. But my brother said that she thinks she’s above her childhood since she met this guy. He came from a rich family that doesn’t seem to have family issues. So I guess she’s trying to forget about her past? Idk but I just feel like I can’t even have that sisterly bond with her anymore. Idk what to even do. She makes me feel bad about even trying to open up to her. Our relationship has just become so superficial. I can’t even talk to her if my husband and I have issues. She acts like her marriage is perfect and I’m crazy for having marital issues so I don’t even bother talking to her about it.