在英语中，当你想表达“真的帮到了我”的意思时，你可以使用以下表达：

"You really helped me out."
"You were a great help to me."
"I really appreciate your help."

这些表达都是常见的、正式的英语表达方式。

例如：

"Thank you so much for helping me with my homework. You really helped me out."
"I was really struggpng with that project, but your advice was a great help to me. Thank you."
"I really appreciate your help with preparing for the presentation. Without your guidance, I don't think I could have done it."

这些表达均表示你对别人的帮助感到非常感激，觉得他们的帮助对你很有帮助。