Some people learn their mistake hard after just one night of a lust thrill. And that's just about enough to hit their faces to the wall hard. 

Yes. It is damn shitty to feel like you had to be the one to face the brunt of that fact, that you had to be cheated on to let your partner realise that hey, you were the one all along. And your partner has been unsure at all. 

But whatever that shitty feeling is to you - the moment you let that anger dissipate and receive the gravity of the situation, is break up the only solution you have? 

Consider your love for your partner. Are you willing to overlook the heavy mistake as you would forgive let's say a friend? I know. It's a different matter altogether if it is your friend that is doing it than your partner. The blow weighs heavier. 

But everybody says your partner is your best friend. Does it not apply, metaphorically speaking? 

Chances are is that you would not. It isn't wrong. What I am just trying to imply is, are you able to let your best friend / partner go in a snap? Are you really able to let go the memories, no matter how long or short, go? 

Every relationship has its own quarrels. Fair share of hurt and tears, blows and punches. Is it fair let's say you want a break up, and your partner rejects the idea - just for the sake of your sadness and closure?  Are you able to find the decency, to allow explanations and your partner's own full closure? 

Never prolong a hurt. Be it yourself, or your failed partnership. Never ever punish someone for so long. It is excruciating. Say goodbye, and be firm. And what is more fair. Is to do it face to face. No matter how hard it is for you to face that person who you so pampered for god knows how much, that is the final closure you can give yourself as well.