YOU SAID:
I'm selfish, I watched you stay.
INTO JAPANESE
私はわがままです、私はあなたがとどまるのを見ました。
BACK INTO ENGLISH
I'm selfish, I've seen you stay
INTO JAPANESE
私は利己的です、私はあなたがとどまるのを見てきました
BACK INTO ENGLISH
I'm selfish, I've seen you stay
That didn't even make that much sense in English.