I can explain this because I do it all of the time! I like every item that I have any interest in so that I can go back and find it again in the future if I want to (since the search function is so terrible). If I want to keep several items in mind that I am considering, I will unlike and like them again, possibly even every day, just so the items stay at the top of my likes lists. So I think it's definitely the case that she is considering your items, but probably just not ready to buy them yet. I hope that helps!