This is true. Heartbreak is just like your late evening leg cramps, it hurts like hell and you just want to grab the nearest sharpest thing and start sawing your leg (or heart) off, but subconsciously you know that there will be that split second where the pain will be gone in a snap and you'll fall back to your deep comfy sleep (or comfy lifestyle). 

Being an observant human being, I gathered a couple of tips to finally get to that "snap gone pain" moment from heartbreak.

ONE

Closure. It is a good thing to have closure. For people like me who spends most of her time inside her head,  if closure is evasive your mind will KEEP ON formulating bullshit about what happened, why it happened etc etc and I assure you, it will get you nowhere but down.

My previous break up didn't have any closure until after 3 months. And although I tried to mask the dreadful event with positivity, there's always that nagging voice at the back of my head that constantly asked what did I do wrong. 

Due to some circumstance, I received a text message around May (we broke up February) and he was asking for my forgiveness. I was not mad anymore so I said "okay, it's done. I'm okay". Being the polite person I am (shut up, I truly am), I asked him about his family and his girlfriend (we broke up because he wanted to be with this girl) and he told me that they broke up 3 days after they got together (which is 5 days after we broke up, douche I know) because he realized that what he felt for her was intense but superficial, while what he felt for me was sustained but real. The moment I grasped the understanding that he resented what his decision was, a switch came on and I finally felt like I moved on and the pain is finally gone. We communicate platonically, at one point I think he wanted to get back together, but I was over him that I said "no thanks" (non verbatim). 

TWO

You know how they say "Love yourself first and foremost to avoid heartache and disappointment from loving others"? Sure, it works but I found another way to do prevention and cure.

"Know and comprehend how much God loves you and you'll never be depressed how conditional human love is"

It's very Christians-specific, but hey... it worked like aloe on a burn. 
If you're further interested on how this helped me, listen to One thing remains - Jesus Culture, there's this part there that said "Your love never fails, never gives up, never runs out on me" and that line made me cry because of how amazing my God is when it comes to loving me.