What do these Bob Dylan lyrics mean?

I think its he loves her so much, but the relationship just isn't working out. She won't commit. She won't call out his name, turn on her light, etc. He really really loves her, but she wasted his time, she wouldn't take what he could give but only wanted what he couldn't give. He wants to stay, and he wants her to be able to commit so that he can, but she won't. He says the really hard stuff in here. Even though he loves her, he's willing to tell her that she really screwed up a good thing.