Well I personally don't care about looks and I believe attraction comes from within, chemistry comes from emotional connection for me. Not looks. Plus looks fade. On the other hand if there is no attraction at all then it might never be there.

Talking about weight, I’d be only worried about health concern of excessive weight. It causes health problems but if he is trying to lose and eat better, it’s all good. It wouldn’t stop me

How long you’ve been dating? I’d say if it’s been steady going out for months and you feel no attraction, it might not be there. If it’s been only few dates, you don’t really know where it’s going and you should give it time