Mike & Liza’s Family Feud: Make New Friends But Keep The Old

Dear Mike & Liza,

My brother is getting remarried to a very nice woman. I’m sure she makes him happy and I’m glad they have found one another. I’m trying to find a place for her in my heart, but the truth is, I miss my former Sister-In-Law. I loved her and I thought we’d always be sisters. I’m having a difficult time loving this new woman as much or in the same way. Should I tell my brother all of this or just keep it to myself and hope I learn to love this new person?
Jessica, Pocatello