It's simple. There really are not very many words in this song, but it's easy to get a profound meaning out of it.
She is gone because he made it that way. He let her go and perhaps didn't realize at the time what he was giving up. Now--later on as time has elapsed--he sees that he's made a mistake, but when they were together he was leading her down a path that wasn't good for her. The things he exposed her to were wrong, but she followed like a puppy because she loved him. Now he's regretting ending it, he's regretting those wrong things that he did and he's wondering why he has to feel this pain. Why can't he just be numb and unaware of it all?
It's simple. There really are not very many words in this song, but it's easy to get a profound meaning out of it. She is gone because he made it that way. He let her go and perhaps didn't realize at the time what he was giving up. Now--later on as time has elapsed--he sees that he's made a mistake, but when they were together he was leading her down a path that wasn't good for her. The things he exposed her to were wrong, but she followed like a puppy because she loved him. Now he's regretting ending it, he's regretting those wrong things that he did and he's wondering why he has to feel this pain. Why can't he just be numb and unaware of it all?