How do i help someone going through heartbreak?

I’m in bits watching my father cry and tell me how much he wants to die after the woman he fell in love with just left him tonight. I raced over to his house after I picked up the phone to him crying, I came in the house, rose petals all over the floor, expensive incense oils and massage oils on the side he just purchased for her today, all this food and pure stems of roses in front of a log fire, he’s just sat there weeping and in so much pain. I feel so broken watching him go through this, how can I help him?