Since I see some people still having problems and because I find the other comments confused so hopefully this guide might helps
I also found out that It didn't matter if you picked yellow roses as your favourite so picked whatever you wanted and something to keep in mind if you get a bouquet of flowers and a poem that meant you messed up somewhere
Go to the window
Go to the man
Visit the flower
Treat yourself to a nice lunch
Go for a run
Linger and assess (escape the mob)
Swan park
Relax at home
Check up on him
Ask about his son (Don't charge the subject)
Buy new pillow
Stay
It's more important to leave
Stop by before (The after didn't have 3 option even though it have the same outcome, a bug or maybe I'm misreading?)
Step inside
What if they're all connected
Wait
I like your watch (don't let him leave, keeping compliment and lying until you get the info)