Hi all, 
This is my first post on the boards...hope I'm doing it right! Well, I just needed to get some advice. I have had an extremely challenging year. Since Christmas 2004, my right lung has collapsed 6 times. I'm 24 and otherwise healthy, and we never found a cause. I've spent 33 days in the hospital between February and July and have had 3 lung surgeries. The last one was an open lung surgery where they removed the entire outer lining of my lung. Now, this is pretty major surgery if I do say so myself! I've held up through it all, but I have learned quite a bit about life this year, and have learned a lot about friendships. I'm not looking for pity or anything, but needed to give the backgroud so you'd understand. 
I have one friend that is pretty selfish, and I'm more laid back and giving, but we'd been best of friends for the past 6 years or so. Right around Christmas she started dating a guy and our friendship started to fall apart a bit then. Well, she came over after my first surgery and watched a movie with me. The second time she called me on 3 different days and told me she was coming up to visit me in the hospital. It was over and around Easter, and she never came. I cried, because I was very disappointed and I think I realized then that I wasn't getting anything out of friendship at the time I needed it the most. After the third surgery she did come up one day (after no-showing a few days), but it was a little awkward since I was in pain and was a little bitter towards her at that point. Since then we've played phone tag but haven't really talked. She called me a couple of weeks ago and I haven't called her back. I have a problem with letting frienships go. How do I end it? She is definitely the dominant personality in the friendship. I went through a slight depression afer each surgery and needed her, and she let me down.  
The second friend (sorry I know this is long) was a college friend. I was in her wedding in June and hadn't heard from her until I called the night before my open lung surgery in July. She called back three weeks later. We've played phone tag now for a few weeks, and I've intentionally been using my odd work hours as an excuse.  
I have been hurt by both these people-my physical scars have been healing, but the emotional ones seem to be a bit harder to heal. Are both of these friendships toxic? I don't want to feel selfish, but I just feel let down by these people in my greatest time of need. I am lucky to have a very supportive family and many other fantastic friends, some that one come up every single day I was in the hospital, so I focus on that and how lucky I am. I just want to get rid of the bitterness I hold towards my other two 'friends'. Do I just not call them back? Help with some words of wisdom! Thanks so much!