This might not help much now, but think of this; at the end of the day, you are the one he comes home to. Yes, we feel attractions to other people or not but that doesn't mean that we love the one we call our other half (ves) any less.
Your stress is understandable and it is a hard pill to swallow, but this is something you have to settle within yourself. If you are worried, talk to him about it.
Look at your traits Lewi, what makes lewi such an amazing person? I'll bet you have more going for you than you realize. You are a gifted writer and caring, that much I have seen from around the forums here. You are smart, you are who he fell in love with. An attraction isn't a relationship, it's just attraction. He knows you and loves you for being Lewi; after all, there's only one of Lewi. You have gifts that he loves; why don't you two go out on a date night and really get to spending more time with one another?
Take a walk, have a beach day. Or just watch TV and eat popcorn, so long as you two are together.