I fear that my frustrations on knowing that my love for my wife is hopeless will make our life together eventually unbearable.
She is a beautiful woman whom I have known since I met my wife.
Perhaps you would see how emotionally abusive this relationship is.
Recently my wife acknowledged that she is no longer in love with me; she loves me as the father of her children, admires me, respects me, loves me as a family member, but is neither attracted to me nor in love with me.
Can we imagine for a moment if the roles were reversed? It sounds like something that has been there for over half your relationship.
I have never thought romantically about her.