Losing 26 year old sister to cancer

My sister was placed on hospice and she’s rapidly declining. She’s been fighting stage 4 cancer for the past 2 years almost to the day. She has always been my best friend and we’ve always been so close. I can’t fathom a life without her. It makes no sense. She’s always been so active and fit. Never did drugs, seldomly drank. She’s always put everyone else’s needs above her own. She fought so damn hard. We were supposed to raise our kids together, but she’ll never get the chance to be a mom. I just had a baby 5 months ago and she just loves my daughter so much. I’m so grateful she got to meet her. My sister was the first person I told when I found out. She was so excited about being an aunt. Her husband is crushed, I worry about him. They were HS sweethearts. My mom will never be the same again. She lives her life through her kids. My sister, brother and I are her life’s purpose.

How do you move on? Does life get easier? Enjoyable ever again? Idk how to be a present mom and I know I need to be. But every new and fun exciting thing in life will also come with overwhelming sadness as I’ll think about how my sister should be here to experience them too. My sister was a nurse before all this. I am as well. We worked together for some time. Also took care of hospice patients before, and to see her on this side of things is absolutely horrible and unfair. I just remember having those conversations with her saying “I can’t imagine what they’re going through” to now being the ones to go through something like this. She puts her heart and soul into everything she does and loves so hard. I don’t know how I’ll ever move forward.