A lost soul..

How would you choose between a man you are in relationship with maaaany years and for who you feel like you "owe" him everything:marriage,love,kids...and a beautiful young girl you met and fell in love like never before. A difficult dilemma.At least,for me.If i follow my reason.i will not hurt (he doesn't know for the girl) him but i will probably be miserable for the rest of my life.If i follow my heart,he will be devastated..and i am not the person who hurts others for my own benefit...