My husband's deceased wife left me a letter, but I don't want to read it.
Wow, aren't you curious about what she wanted to say to you?
Yes and no. I'm afraid it might be really sad.
Even though the letter is for you, it's okay to not want to read it. It's personal and maybe involves their lives together. You don't have to read it.
I'm really conflicted about it. I think I'd regret it someday if I destroyed it.
I can empathise with you. Since you're uncertain right now, why not file it away somewhere, like a safe deposit box. That way you don't have to deal with it right now, but if you change your mind, you won't have to regret having destroyed it -- you can always dispose of it later when you're less conflicted.