Ouch, right to the point.
There are lots of crappy ways to break up with somebody, but the worst way I ever did it was the passive-aggressive way, the one where you slowly withdraw because you don't want to deal, but don't actually want to admit it, and then get too wrapped up in just about everything else. This stretches a breakup over months. It's terrible. Don't do it.
The other party in this breakup isn't blameless; I had reasons to withdraw and not deal. But I should have at least had the testicular fortitude to lay out how I was feeling, but I didn't.
On the other hand, she dumped me for a woman, did the exact same crap to her, and now neither of us talk to her and we're good friends. So at least it makes a great story when drinking, and it was a learning experience.