Maybe the conversation is about break-ups and how to weather the storm. The rain is the tears. The new girl is now --possibly-- his new girl; she could be his "world". Its raining on her. She is obviously on the rebound. He is more over his ex than she is. But then they face the real showdown: is he meant to be with her intimately when she is so obviously hurting over her recent loss? Or try to wait it out, be her friend, and work towards something more real and lasting? This could be a long night, especially considering his faith in a LTR could be at an all-time low.
Just thought of more:
Maybe the conversation is about break-ups and how to weather the storm. The rain is the tears. The new girl is now --possibly-- his new girl; she could be his "world". Its raining on her. She is obviously on the rebound. He is more over his ex than she is. But then they face the real showdown: is he meant to be with her intimately when she is so obviously hurting over her recent loss? Or try to wait it out, be her friend, and work towards something more real and lasting? This could be a long night, especially considering his faith in a LTR could be at an all-time low.
And that is one possible interpretation.