The Problem with CAD and Armitage is simply their poems are far too symbolic and have too many euphimisms. Obviously the poem is not about the apple, it's symbolic to something she truely cares about; whether this is a person, or an action (such as love, hatred).
"I found an apple
A red and shining apple
I took its photograph"
This gives me the impression that the thing she's referring to is perfect, it's exactly how it should look, this encourages me to think that it's now directed at an individual person, this feeling is exaccerbated by fact she took it's photograph. The language is relatively simple, which indicates to me she's writting this account as a child, or in the perspective of a child, and what does a child love the most? Their mother.
"I hid the apple in the attic
I opened the skylight
and the sun said Ah!"
She doesn't want to share the apple, which again indicates to me she's writing it as if she's a child. The last two lines are very hard to interpret, but I think they have two meanings. Either that the thing the apple is a euphimism for is loved by many other people (people being a euphimism for the sun), or the fact that she's let someone else voice their opinion on the thing she loves. Now the fact she's used the word "sun" is quite significant. The sun, when talking about the world, is an extremely important aspect, it's what keeps our planet going in a number of ways. Translate this into Childs talk and you've got someone who cares for child, feeds them etc. Again it could be a euphimism for the mother, but I'm thinking it's more geared towards the Father.
"At night I checked that it was safe,
under the giggling stars,
and the sly moon. My cool apple."
The language is extremely simplistic and childlike, "giggling stars" she has given personified the objects, which again support my theory that the sun, apple, stars and moon are all related to people. The giggling stars could be a relative, as could the sly moon, both words as a decription to the relevant people.
"Whatever you are calling about,
I am not interested.
Go away. You with the big teeth."
Very hard to interpret this stansa, I'm initially thought along the lines of someone calling her, and she's no interested, she's far too occupied from thinking of her special person. But the use of the phrase "you with the big teeth" really puts me off that theory. I'm now gearing towards two ideas. One is that teeth are a euphimism for someone else, or she's having a dream.
The title Lovesick, is extremely hard to interpret into the relevance of the poem, the only thing I have just thought of is if her mother is in fact dead, and she's simply reminissing about the times she had with her, in a dream. Which would support my last paragraph referring to the dream. Children are well known for associating real people with objects they are familiar with in their dreams, If the theory about her dead mother is correct, here's what supports it.
"I found an apple
A red and shining apple
I took its photograph"
She thinks she found her mother, and she was perfect, she took it's photograph to remember it by, which now is more important than previously.
"I hid the apple in the attic
I opened the skylight
and the sun said Ah!"
The apple is her dead mother, and the attic is a euphimism for Heaven, the skylight would be the door and the sun would be god.
"At night I checked that it was safe,
under the giggling stars,
and the sly moon. My cool apple."
She could've visited her grave in the evening, she's sad and trying to think happy thoughts, so associates the stars with humour.
"Whatever you are calling about,
I am not interested.
Go away. You with the big teeth."
This final stansa keeps stopping me from completing a good theory; it's quite disociated with the rest of the poem, which leads me on to think that it's disjointed in the storyline. So she could be having a bad dream; and the big teeth, could be something like a Truck or similar, the object which could've killed her mother.