Is it weird that I'm in love with my dead best friends widow?
Does it feel weird?
No, he and I used to be pretty close friends.
I hear you, and I think it's alright in the sense that you cannot control who you develop feelings for. You should however make sure you do not step on anyone's toes or disrespect your best friends memory.
I'm going to talk to the spouse tonight and ask him if he would go out with me.
In a way, it makes perfect sense to fall for each other. Both of you loved the same person and miss her now that she's gone, you're a comfort to each other. As long as both of you are on the same page, embrace the opportunity.