It's call "marking" her territory.
They leave things at your house, or they borrow something from you
that they can wear so that other girls will see...you "belong" to
her.
Have you seen those office girls in crowded coffee shops during
lunch time? They leave a packet of tissue on the empty seats and
think those seats belong to them now. Same chick logic.
Is she interested in you? I cannot tell just base on this.
She could be seeing it as some silly competition and will probably
forget about it the next day.
Conclusion: Don't sweat about it. Treat all the other girls the
same way.
Maybe you have a nice ass.
Next time, when that same guy walks past, FLEX your ass and give
him a smile...
If he smiles back...RUN LIKE HELL
Good luck
