I find this song to be about two people who are good friends and them find themselves wanting more and this person is expressing her fear that if they jump into something, it could ruin their friendship. "I don't want you to go, but I want you so". She means that she is afraid of screwing it up and losing him if it doesn't work out, but it's too hard to deny her feelings for him and pretend to just be friends.
I find this song to be about two people who are good friends and them find themselves wanting more and this person is expressing her fear that if they jump into something, it could ruin their friendship. "I don't want you to go, but I want you so". She means that she is afraid of screwing it up and losing him if it doesn't work out, but it's too hard to deny her feelings for him and pretend to just be friends.