Is it normal to fall deeply in love with a man you don't find attractive?

I started having sex with a man who I wasn't attracted to because I needed some attention after a breakup and he offered to do things to me that I couldn't resist. He turned out to be the most amazing lover. To say he blew my mind would be putting it lightly. Many months later, we cannot keep our hands off of each other. We are so comfortable with each other that the sex seems to just get better and better. We spend very little time together because of conflicting schedules. We spend all our time in bed and it is the best part of my week. This man is not the type of guy I or most women would go for on appearance alone. But his charm, confidence, tenderness and adorableness, combined with our unbelievable chemistry have me hooked. Like, literally addicted. I am answering the door naked, freshly showered and so eager for our night. Is this sexual obsession or love? I think about him all the time but our lives are so far apart except for the nights we are with each other. How can I be so sexually attracted to him but not find him attractive to look at? I love touching him and going down on him and especially love cuddling up to his big hairy body. Did I just say that? WTF? Can somebody who is unappealing to you end up being the love of your life or is chemistry only sexual obsession?