In Islam the only interfaith marriage permissible is a Muslim man to a Christian or Jewish lady and yes this too is in the Quran.
Guess its all about faith in our holy scriptures and the knowledge we need to have in understanding it all.And know that not always will we necessarily love everything He has commanded us with but we should still accept it knowing He still is All knowing. Either ways I pray both you and I are always blessed with guidance by our Ever Living Most Merciful Lord.
And wish you a wonderful day..as always its a pleasure talking to you!