I've known her for about 6 years and feel that I have barely got past a certain level of friendship with her. I know she's a 'private' person but rightly or wrongly I sometimes feel frustrated at how surface-y our friendship still is after all these years. She doesn't have many other friends and I know she sometimes struggles with low mood etc. I suppose I'm just very different and enjoy having a good level of intimacy with a few close friends. This makes me sound very judgy and horrible and I'm really not I just can't articulate well that it actually sort of hurts that I'm kept so much at arms length by her as she's probably the friend I see the most at the moment!