Valentine's dream

MR.right
dream lover

dream lover.

dreamlover
lover in one's dream
如果说的是女生可以说是 girl in one's dream

Dreamlover 梦中情人 
Imaginary Dive 梦中情人 
Girl In Your Dreams 梦中情人

1.  因为我今天遇到我的梦中情人了。
A. Because I met the woman of my dreams today.
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2.  033因为你是我的梦中情人。
Because you are the lover in my dream.
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3.  她看上去就是一位完美的梦中情人。
She looks a perfect dream.
 

In dream sweetheart 

dream lover 
the person in my dreams 
my soul mate 
my other half 
dream babe
我曾经读过一篇小说，有这么句话？who is your dream babe?
beside "dream lover", there are other options. one of them is: 

dreamboat: actually, it's not a boat, but a person that than which no greater lover can be conceived (the greatest conceivable lover). 

看过《实习医生格蕾》么？那里面有一个词对“梦中情人”有很经典的诠释——Mcdreamy