[pizzicatogo]

Hello everyone, I have a couple of questions about a couple of things I guess. All of them are related to Japanese language though, so here we go.

1) Why does 愛してる use を instead of が like 大好き?

example: a) 君を愛してる。
b) ケーキが大好き。

2) If someone were to say "I love you", how would you say "I love you too"?

example: Sally) tomを愛してる
Tom) Sallyも愛してる (would this be correct?)

Tom) 私もSallyを愛してる (this is wrong right? it basically says I
love sally too right?)

Thank you