YOU SAID:

she's in my head and i can't stop thinking of her i wonder if she thinks of me like i think of her before i go to sleep

INTO JAPANESE

私の頭の中は彼女と私は彼女が私の考えている私が寝る前に彼女のだと思うようなかどうかだろうか彼女の思考を止めることはできません。

BACK INTO ENGLISH

Before going to bed in my head she is I think I have her and I think she thought whether or not will cannot stop thinking of her.

INTO JAPANESE

頭の中で彼女をベッドに行く前に思う私は彼女と彼女は考えたかどうか彼女の思考を停止できません、だと思います。