But I Do

This is definitely one of my favourites from the album. I think this song is about being led on by someone or an on/off relationship. I'm not really sure.

I agree with emilypowers.

I think it's about trying to be friends after a break up, and the person who ended the relationship being confused about their feelings. Ultimately dragging this person along with them on their quest to try and figure out what they want and how they feel. I sense a lot of leading on, guilt tripping, and neglecting in the lyrics.

yes most definitely agree with both above comments

the last part of the lyrics "I am what you need when you can't find it somewhere else. I am what you want when you don't want anything else." is saying that the other person in the relationship isn't interested in them until they can't find anyone else so they keep taking them back and ultimately fucking with their heart, you know

"We can keep in touch if that's what you want, you can call me too if that's what friends do." They both had something going on but instead of just dropping everything they both feel they have the need to hold on "It's not more than one, if that's what you thought." She dosent really have a relationship like this one with anyone els, even though it appears that he has accused her of having it with several others.
"You'd say I don't have the room for you, But I do." Because of this acusation, he will continue to say that she doesn't "have the room" for him in her life. She does however argue back and states that she does, "but I do". "I do" in popular culture can sumtimes refer to accepting a marrige preposal. She probably uses the seriousness of the tone attributed to those words to solidify her eomotions better.

"I could stay inside if that's what you want" She is angry with him because of his covert abbuse, or making her feel guilty beacuse of his own insecurities. She will stay inside the house bloking out the world and brew in her anger. "I won't say a word for a day or two." She will stay home and not say a word, probably even refuse to see him. "When I'm in my room I know what to do about you. I can sleep Soon" When she is in her room she feels she can forget about everything if she sleeps, she therefor knows "what to do about" him.

"When I get home I am kept from every room in the house" Every room reminds her of him, Im guessing good and bad. "I'll walk down the hall where you have gone to feel the way it felt again" She walks down the hall probably to the room where he is but wont go in, just standing outside helps her feel closer to him and maybe fills her with a sense of melancholy, reminiscing of old time when everything felt right.

"I am what you need when you can't find it somewhere else." This part can be interpreted in many ways, basic ideology I would guess he only uses her for sex, but he could probably also use her as someone he can go to when he needs to talk about stuff, this also tise back to why he would "keep in touch" as refered to in the first line. "I am what you want when you don't want anything else" He doesn't really know what he wants so for know he hangs around, she herself feels confined with this entire relationship for whats is worth if it even still is something. This entire song has an undertone of missing substance: it dosent question whether or not their relation is adequate for both of them, it instead makes it obvious of the lack there of.
The last four lines are her eventual conclusions drawn from everything she mentions in the lyrics.