Aunt agatha says that gussie "'has lost his head over a creature." how do these words reflect her feelings for gussie? they show her concern that gussie is always buying pets. they show her concern that gussie likes america too much. they show her disdain for gussie's lack of self-control. they show her disdain for gussie's sense of friendship.

When you say that someone has lost his head over something it means they have an obsession towards that thing. Liking something too much is a form of obsession. So the feelings projected by Aunt Agatha is a concern that Gussie likes America too much. 

We can’t give you the answer if you don’t show us where you’re supposed to get this information from

It could be 1, 2, or 4, depending on the context.1.) they could have had a fight, and she is too humble to say anything further. she wants robert to say something first.2.) maybe he's staring at a computer playing tetris while she's wearing a *really* tight red dress. just sayin' xd3.) is unlikely given that it's only one sentence worth of context long. 4.) it's possible their relationship is more 'mutual hatred' and they tolerate one another.it could be 1, 2, or 4, as long as you can provide sufficient explanation why. remember this as you write!