I agree with modernmeggie, to me the song refers to a recent break-up.
I even think the other person broke up with the singer because she did something to hurt him, probably cheating. That's why she can't explain where she has been (with someone else).
She did not plan for it, can't explain why she did it and knows it was not a very good thing to do, she should have known better.
But instead of being sad because of the consequences she feels ok, even free. Maybe she realizes that the reason for her cheating was that she wasn't really happy in the relationship anyway.
That is also why it wouldn't make sense to start all over again and fix it, especially because the other person doesn't seem to care so much about it either and shows "no reaction".
Could be that they both had doubts before and now they can stop to pretend that it's working and admit to themselves that they just weren't "supposed to be". This honesty as a result of the cheating gives them freedom and feels good.
I agree with modernmeggie, to me the song refers to a recent break-up. I even think the other person broke up with the singer because she did something to hurt him, probably cheating. That's why she can't explain where she has been (with someone else). She did not plan for it, can't explain why she did it and knows it was not a very good thing to do, she should have known better. But instead of being sad because of the consequences she feels ok, even free. Maybe she realizes that the reason for her cheating was that she wasn't really happy in the relationship anyway. That is also why it wouldn't make sense to start all over again and fix it, especially because the other person doesn't seem to care so much about it either and shows "no reaction". Could be that they both had doubts before and now they can stop to pretend that it's working and admit to themselves that they just weren't "supposed to be". This honesty as a result of the cheating gives them freedom and feels good.