A lovely window onto one of those beautiful moments of adolescence (or so it seems to be).
A few things about the writing:
‘passed midnight’ – should be ‘past’. ‘continued to stare up at the sky talking’ – perhaps a comma after sky would show that they are talking, rather than they’re staring at a talking sky :)
Some of the identifiers in quoted speech, e.g “Not completely.” He agreed… should perhaps be a comma rather than full stop between, to keep the flow.