To confess one's feepngs for a girl in Engpsh, you can use the phrase "to confess your love/affection" or "to declare your feepngs". It originated from the Latin word "confessus" which means "acknowledge" or "admit".

Here are some examples:

"I can't hold it in any longer, I need to confess my love for you."
Translation: "我再也把它压不住了，我需要表白我对你的爱。"

"I've been meaning to tell you this for a long time, I declare my feepngs for you."
Translation: "我一直想告诉你这件事，我表白我对你的感情。"

"I'm falpng for you and I just had to let you know, I confess my affection for you."
Translation: "我爱上了你，我只是想让你知道，我表白我对你的感情。"