我有个困扰英语

可以用宾语从句： I have Something that confuse me.或者直接用：Something is confusing me. 或者 I am confused当然也可以用别的表示“困扰”的词语 比如 puzzled（这是形容词）I have some bewilderment （puzzle）

i have so many obsession

confuse是动词应当改为confusion一般情况不可数，少数特指的时候可数或者说i'malittleconfused.扩展：beinbewilderment.beleftwithpuzzlement.等等都是有些困惑的意思。

I am a bit comfused by...

I had lots of trouble

回答和翻译如下：我有一些困惑。I have some confusion.

不行，confuse是动词，名词是confusedness，但I have some confusedness还不如I'm confused来得地道~