あなたに他に好きな人ができるのがこわいって英語でなんて言うの?
まだ月合っていませんが、お互いに好きなのは分かっている状況です
回答
-
It's scary to think you might get attracted to someone else.
-
I'm afraid that you might fall in love with someone else.
好きな人ができる = get someone attracted to you, find someone you like, fall in love with someone