Originally Posted by CheeseFrog

Women can often send mixed signals that guys often misinterpret. However, in this case it appears clear that Melissa is interested in you, to the extent of asking you to spend the night. I'm sure that if you think back, you'll find some "ah ha!" moments where you weren't aware that she was sending you signals, but in retrospect she couldn't have been more clear.

Now instead of snubbing her, ask her out and see where it goes from there