How do I be a good friend?

I finally have a bf that i rly love, and im new to the relationship world (we been togetehr for 2 months) anyway, i can't help but be all happy, and sappy on my myspace, i'll write lovey status's about him...but meanwhile my best friend is insecure about herself and basically got shot down form her long time crush....i try to console her as much as i can...(now i never talk about my bf or anyhting sappy when im around my best friend, so i wont make her feel weird or anyhting, but when she reads my status i think she feels sader) and you know i dont know what to do, i try and try to help her feel better about her issues, and i truely do care for her, but she just keeps negative sad thoughts. She makes it impossible to be a good friend cuz she shoots down my advice or whatever...and im not really good at giveing advice...when i told her that it took me forvere to get over a guy she tells me i'll never understand what she is feeling...i honestly don't know what i can do anymore. =(