Thank you guys for taking the time. They are all very helpful, but different pieces of advice. That's very good, because I'm seeing things in different ways and trying to make a good decision based on those.
The constructive criticism you have given, Lychee, has knocked some sense in to me. I will admit the disconnection has been much stronger since that conversation (it was a fairly long time ago though,) but there was still some before that. In fact, if I elaborate, she claimed to me that the relationship was not as it used to be (this was the time of this conversation.) She said it's all different etc., yet I noticed nothing wrong. I told her this, and that's when the need/want conversation came about. I told her, clearly, that I don't need her, but I most definately want her, and that to me is stronger.
I think my plan of action is to talk to her, like JHL has suggested, when I next see her. I'll talk to her from the most caring and giving point of view; i.e understanding where she is coming from, but also taking my own feelings in to consideration. I think talking about why she feels she likes the company of other guys will help. Unfortunately, I'm not sure if she will think I am just going on about something that should be water under the bridge. If she takes this attitude, I guess it's best to kindly state that she clearly doesn't care for the relationship or my feelings as much as she could, and it's not possible for me to be in a relationship like that and so be it.
This is going to be tough. Breaking up has never been on the cards in my mind like this; but the only constant thing is change
Thanks guys.