"Rainstorm" refers to the influence or pressure brought by some things. "Losing" should mean losing yourself, which may imply breaking up; The whole sentence should mean, will we lose ourselves in the face of great pressure and obstacles? Will we break up in the face of great pressure and obstacles? )

And it is obvious that she is confused about something or a relationship and has no confidence. This sentence also means that she can't see the future and has no confidence in it.

I hope some of my ideas can help you. Good luck.