Once I heard someone was saying, "you break someone's heart, and turn around bam, another person will break your heart!" I think we may suffer less of heartbreaking if you know the truth of the person who breaks your heart and you become the person who breaks someone else's. I mean when we think someone, who you're not interested in knowing, decides to leave you alone, you may feel like, "oh it's so great. She/he's gone!" Usually, heartbreakers don't suffer at all or suffer only tiny bits.
Sometimes, lust or infatuation is misguided with lovey feelings. I strongly liked some friend last year. He gave me enough time me to think it wasn't what I thought it was. I haven't seen or heard from him for many months anyway. When this friend contacted me a few weeks ago, it was like, "what now? you made me wait long enough to forget about your presence on earth completely." He's not my friend anymore. Time and distance (space) actually do make a miracle and a healing. If things were clear whether it was a friendship or a relationship, he could've been still my friend. I didn't break up with that friend last year, and it was just silence and ignoring. But, it was a good experience of closure (relatively painless break-up) with that friend.