Stalking?
“When we first split up, he called me a stalker, but that’s like and emotive word, ‘stalker’, isn’t it? I don’t think you can call it stalking when it’s just phone calls and letters and emails and knocking on the door. And I only turned up at his work twice. Three times, if you count his Christmas party, which I don’t, because he said he was going to take me anyway. Stalking is when you follow them to the shops and on holiday and all that, isn’t it? Well, I never went near any shops. And anyway, I didn’t think it was stalking when someone owed you an explanation. Being owed an explanation is like being owed money, and not just a fiver, either.”
Jess in «A long way down», Nick Hornby, Penguin, pp. 6