There are several ways to convey this, but you may say 'betsu ni.'
Hontou ni.
Xinda
Sugoku oishii
-.- I can speak Japanese and you don't say it any differently really, except for maybe the accent I suppose.
Hontou ni ai shiteiru.
Anata WA hontōni suki
Really? Seieki せいえき
You may say "anata/kimi ga hontou ni suki desu."
It would really depend on how it is being phrased, but usually it will be "to" as in toe.
Well since i am not Japanese i don't think it is good lol....but some people think its good......try it!
Not really possible to translate directly.
Rampu!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Like a really angry Japanese man;-)