Re: padded push-up bras
There's nothing wrong with wearing make up, getting plastic surgery, etc. If it makes you happy then do it. If he's a good guy he probably wouldn't dump you but it will make you look bad for lying. The point is though you shouldn't lie to begin with because if he's a good guy, he won't be overly concerned with your size. What I fear that all this will do is attract the wrong guys who will be with you only for your size and it will be a big mess when you finally admitt it or he notices.
Relationships should never start off as a lie.