Oh girl, I totally feel this question. I am truly happy for them when they tell me. Like Nikki mentioned above, I have been at this for a while too, and I have been the friend to set my friend up with a FF site and tell her about the ropes, then the first month off BC after 15 years she gets prego. Back in August, I counted up all my friends that I knew who were PG - whether it is church, work, or from college that I actually hung out with and the count came to 23.
23.
Since then, loads more have graduated to the pregnant status. My best friend, my boss at work, my co-worker's wife, my best girl friend at work (the one I taught the FF site to, temping, etc.) and a couple others. So I have definitely felt it.
But the truth is, that yeah even though it stings every month that I get a BFN, and yes I have felt like I was actually being tested, I am truly happy for my friends and their sweet journey in their lives right now. Right now is their time, not mine... and when it turns to my time... well, that's a lot of girls who are getting invited to my baby shower, dang it.

But seriously, I understand how hard it is, and in the end I take comfort in knowing that it's going to eventually happen, and every month I just get closer.