Ah, there isn't much you can do about it, so just accept it. You don't mention it in your post, but all the pseudo-scientific claims on 'cellulite reducing' creams are obviously a load of rubbish - I'd advise you not to waste your money on anything like that. Boys don't notice because they don't know what it is and besides, get distracted by other things, so you shouldn't worry about that.
You can avoid the bikini problem by buying matching bikini shorts instead - I prefer the look of shorts, and they're in all the shops at the moment & so not hard to find.
I don't know if I've got any. I probably have, but if I go and look in the mirror I'd probably only stress about it. Given its location, it's fairly easy to avoid having to look at your own bottom anyway!