Say they are the one who ended the relationship but still want to remain friends but you tell him/her you can't be friends and you need space but they continue to call once or more a week.
Most Helpful Girl
They realise you were meant to be friends only as romance wasn't there maybe? It depends how long it takes for them to request a friendship. If it's been like a year usually they had a break up and use the friends card to try get back in your life but if it was not long after break up then he really just wants friendship0