What do these lyrics mean? Why so sad? (look at the picture)

Remember we made an arrangement when you went away
Now you're making me mad
Remember, despite our estrangement,
I'm your man

You'll be back
Soon you'll see
You'll remember you belong to me
You'll be back
Time will tell

I feel like it means that a man wants someone back and is saying that you'll see that you want me back too

Explanation:

just my feels (sorry i couldn't read the pic, plz tell me if this wasn't what you were hoping for)

answer: do

the 'italicized phrase' is a noun clause that is used as a direct object.

c. nature verses humanity is correct