I've been studying for so long, I'm embarassed to even tell you.
"何年勉強しているの答えるのが恥ずかしいくらい長いです"
- I've been studying for so long, I'm embarassed to even tell you.
- I'm embarassed to answer how long I have been studying. I've been studying for so long it's not even funny.
- I have been studying for such a long period of time, it's embarassing.
I've studied English for so long that even answering how many years I've done that is embarrassing.
こんにちは。
ご質問ありがとうございます。
"I've studied English for so long"＝「私は英語を本当に長い間、勉強してきました」
"that even answering how many years I've done that is embarrassing."＝「何年、勉強してきたかを答えるのが恥ずかしいぐらいです。」
ご参考になると幸いです。
It's almost embarrassing for me to tell someone how long I've been studying English.
I'm kind of ashamed to say how long I've been studying English.
この場合、次のような言い方ができます。
ーIt's almost embarrassing for me to tell someone how long I've been studying English.
「どれだけ英語を勉強しているかを答えるのは 恥ずかしいくらいだ」
ーI'm kind of ashamed to say how long I've been studying English.
「どれだけ英語を勉強しているかを言うのはちょっと恥ずかしい」
ご参考まで！
アメリカ合衆国 
カナダ 
