Confused

My ex broke up with me last Tuesday and at first it hurt wise than I could imagine. I got a lot of advice that it would take at least half the length of our relationship to heal, but it's been less than a week and I'm doing good. There are short waves of sadness but for the most part I'm not upset anymore...is this a sign I wasn't in love? Any advice on what this means would be appreciated because I honestly didn't expect this