Gnr m/.
Personally, I'm pretty sure it's one dude tryna to explain to somebody about his best childhood friend, who was female of course, but how also it was the girl he was in love with. Now currently he feels as if he doesn't know what to do without her, hence the line, "Where do we go now?"
That question has been asked a lot in the 80's. There were probably a lot of departs and break ups.