I disagree a bit.
In my opinion...
Sansa is the ultimate chicken-head, 'social climber'... of this entire GoT story.
Apparently, she still hasn't learned ONE SINGLE THING from her father's death.
Check it out...
1. Her family is fighting a
WAR over
HER. (And she knows it)
2. She has not seen her mother in months. (or possibly years)
3. And now has the opportunity to escape / go home with Littlefinger. (as far as she knows)
4. But now is even considering marrying Sir Loras.

5. Just so she can still be 'in the royal family' (that killed her father) instead of going back to Winterfell.
Deep down, she wants to be
royalty soooooo badly... seems she will continue to abandon her family for ANY opportunity to become a 'princess' (or anything close to it).
Even if her brothers fight a WAR to get her back.
She's such a dumbass.
Even if Littlefinger's intentions was 'on the level'... Sansa would STILL want to marry Loras, instead of go home, imo.