Well, yes. You could have the most amazing personality ever, but if you look awful, no boys will come and talk to you and discover that amazing personality. Of course, if you just have looks and no personality, they will very quickly realise that and leave you alone. You have look half-nice for them to want to talk to you in the first place.
So no; it's not all about looks, but they are important for catching his attention - personality is what keeps him interested.
It is shallow but looks are always first, sorry.