So say a friend suggests going to a resturant next weekend and then ends the comment with well "it's up to you" what does that imply to you.
If a friend says going to a resturant or a movie is "up to you" - that means friend (saying this) is more disinterested than interested?

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2Opinion
Don't look too deeply into things like this. He asked you. Now it is up to you to accept or not.
Or did he mean "The choice of a restaurant or movie is up to you"? That could be a bit passive, but he may have just meant that he would be happy to accommodate your preferences.
Means she wants to hear your preference