Connection with family after losing our Mam

A year and a half ago, our mam passed. 86.

We still have our dad, 87.

Over the past year and a half I feel like my connection with the rest of my family, other than our dad, has slowly changed. I don’t feel like I’m part of that family unit anymore.
I’ve distanced myself in most, if not close to every way.

I see, and spend time with our dad alone or with my immediate family, husband and kids.

I just don’t feel like I fit in with my brother and sisters anymore.