Adeline comes home after a night out to find her dog collapsed on the floor. She cradles him, takes him to the vet, and eventually decides to have him put down.
Not necessarily heavy stalking
Guy is very persistent/pushy and won't leave Adeline alone even though she is distant. Even goes as far as finding out her adress and showing up there unexpectedly.
The main character starts dating a guy, then later finds out that his father is a previous partner of hers. Nothing happens in the present time with her and the father though.