Obsessive love
When you can't let go of an ex, even after they've told you a million times to stop texting them. You're like a broken record, and you're too dumb to realize they're done with you.
'I know you're with someone else, but I'm still your number one fan.'
'You're still mine, I can feel it.'
'I'm not done with you yet, so stop pretending you're happy with someone else.'