"treat you like a princess"- tiara on top of head (something linking to a princess-representation)
"one in a million"- camera goes out and wider so loads more people walking around in frame behind them
"how could you forget what we had"- sewing her moving on whereas he is reminiscing about what they could've been
"I'm waiting waiting for nothing"- waiting alone for her (looking at watch ??)
"buy a house settle down do our thing"- walking towards for sale sign, walking in house with boxes, showing the dream family they have