I would characterize this as a mild to moderate depression. This is only my own "rule of thumb", but hypersomnia is generally a lesser sx than insomnia.
On our assessment of depression we ask about
:episodes of crying or feeling blue or sad,sleep disturbance(too little, too much, mid cycle awakening, can't get to sleep, awaken too early, nightmares) appetite(weight up or down), feelings of worthlessness or guilt, feeling helpless, feeling isolated or isolating self, suicidal ideation or preoccupation with death, anhedonia, lack of energy, difficulty with concentrating or being decisive, hoplessness, and we assess adl's, and look for either psychomotor agitation or retardation.
In an adolescent one needs to look at school behavior and relationship to parents and sibs. A child is a part of a family, not a self suffiscient unit. Reading between the lines of your discription
"a person doesn't have to play football to be allright."
I suspect some parental pressure to participate in "manly" sports etc. If the kid is getting into trouble at school, with the law or at home the additional dx of "oppositional defiant d/o" might be made. If the issue is more that parent is dissatified with child the additional dx of "parent /child d/o" might be made.
In the absence of suicidality the dx of "major depressive d/o" is problematic, but it might be made if many of the other signs were strongly positive. (A person with deep religious convictions might be seriously depressed but not suicidal) I would probably call this kid "Depressive d/o NOS" as an admission dx.
If there were any evidence of mood swings the addition of a "rule out Bipolar D/O" would be prudent.
This pt should also be assessed for pyschotic symptoms, inorder to rule out the possiblity that we might be seeing a first psychotic break in a schizophrenic. Incidence of schizophrenia is about one in a hundred for males with first psychotic break mostly between 15 and 25 yr of age. It often presents as isolation and withdrawal from social activity.
I hope that helps. I know I'm coming at the problem from more of a "doctor" than "Nurse " angle. Sorry, but that's what I do. I'm a night admission Nurse for a psych hospital. I gather the data, put together a probable dx and present the case, over the phone, to the on call psychiatrist, for admission orders.