Big Boys Need Love Too or Nah..?!

Vikki • Mother of a beautiful 1 year old baby girl.! 22 yrs old!
So my best guy friend of 7+ yrs recently expressed deeper feelings for me and I'm really not sure how I feel about this.. 
He is a great catch (financially stable, no kids, etc) the only downfall is his weight. He's a "bigger boy". I feel like I'm being a shallow b*txh for not giving him a chance but, personally sex in a relationship is a huge deal to me and I can't even look at him in that fashion... Any suggestions.?