They just did, they didnt want 2 b with each other any more, its their decision. If they decide they're not right for each other, then thts their choice. Why does anybody break up? Something necessarily doesnt have to have happened, if they're not right for each other, then thts their decision. Sorry if tht sounded ranty lol, it wasnt meant to ;)
Maybe They Weren't Right For Each Other, It Took Them 3 And a Half Years To Figure Out They're Not Meant For Each Other, They Might Broke Up Because They Just Not Meant To Be Duh