So I was talking to this girl and she sent me this message:
あたしもラーメン食べたくなっちゃったw
(She always send me the same message in English, which I got admit that makes my life easier)
Since I was not understanding the sentence in Japanese I asked her to send me it without any abbreviation, then she sent me:
食べたくなってしまいました
I guess it is 食べたい + なる + ??? I don't get the shimaimashita (shima + imasu in the past tense?)
And how could she compress all that with only ちゃった？ Isn't ちゃ supposed to only compress ては？
「食{た}べたくなってしまいました」
is composed of:
「食べる + たい + なる + しまう + ます in past tense」
As far as meaning,
「食べたくなってしまいました」＝
「食べたくなってしまった」＝
「食べたくなっちゃいました」＝
「食べたくなっちゃった」
Those were listed in the order of formality and politeness. Now what do they mean? Here are my personal best:
「あたしもラーメン食べたくなっちゃった。」 means:
"I've got the urge to eat ramen (suddenly) myself."
"It/You got me craving ramen!"
Finally,
Isn't ちゃ supposed to only compress ては？
You are clearly thinking of a different kind of 「ては」 here. For instance:
「行{い}ってはダメ！」＝「行っちゃだめ！」＝ "Don't go!"
The 「ちゃ」 that we are discussing here is just part of 「ちゃう」, which is the colloquial form of 「てしまう」.
It is indeed 食べたい + なる + しまう. しまう means to do all the way or to "accidentally" do. So it's: want to eat + become + by accident. Or something like "I accidentally got hungry".
ちゃう or じゃう is short for てしまう or でしまう respectively. not sure what you mean by ては
