Is it bad that I’m pretty sad about my mom that got diagnosed it’s Dementia (memory loss)? [I Have a Relative With Dementia]

I heard about it but don’t know much about Dementia. One of my aunts told me the doctors dianosed my mom 24/7 care. My cousin said my mom loves us always which of course it’s true always but just don’t get upset if she doesn’t remember. It will take some time to get used to. I know she was a great mom to us growing up. Good news is she’s okay and she is getting care and on medication.
My brother and my love for mom will never change. Planning to visit mom again soon. It just hurts that my mom has memory loss but gotta stay positive. She's 61 going on 62. Love you Mommy 💖
She lives in another state but so blessed that my relatives did what they can to help her.