I've had a similar experience with my marriage. Without going into too many details, my husband is extremely introverted, to the point that he apparently became reclusive while he was in C school before we got married. After two years of long distance dating and an engagement, we married and moved in together and I saw first hand how reclusive and introverted he had become. Even having a simple conversation over dinner was like pulling teeth.
The situation is different for every person, but I think we all have experienced that crystal clear realization that something important to us just won't happen the way we want it to happen. We mentally fight it, saying to ourselves, but I can do x, y, and z! I can make it happen! I can push myself! Then reality sets in and, sharp as a knife, the truth cuts into us. In terms of my career, I came face to face with the ugliness of my pride. How could I be "just a housewife"? I was embarrassed of myself and worried that others were embarrassed of me. Then I had that moment of clarity when I realized that it is out of my control. I'm along for the ride and I must try to enjoy it and adapt. It was the same thing with my marriage. I tried to fight our problems by reading every book, trying every tactic, doing anything I could to combat our communication problems. I cried, got angry, became hopeless, cried some more, ignored it, then repeated everything. Then I had that crystal clear moment and realized that I can't really do anything else right now except love him unconditionally.
Most days I'm content. Not overly happy, not jumping for joy at the way things have gone, but content. Then one day, I'll be going about my business, unsuspecting, and it happens. The doubts start to come back and so does the fear and pride. I start to compare myself to others and, worse, to an imaginary image of myself that I've created, an image to which I'll never measure up. I wish I could tell you some magic formula to make these thoughts and this attitude go away, but I don't. I have learned that if I keep it bottled up and press on, the thoughts tend to turn into more physical problems like insomnia or despair. I'm slowly learning how to identify them and when I do, I write them out like I am now. Even if it's just to myself, getting it out into the open seems to help. Erika recently wrote a post called "Secret Keepers and the Truth" and noted that for all of our attempts to bare our souls, bloggers keep secrets. I do.
I'm not sure why I wrote this post and it certainly doesn't have a clear cut point. I suppose I just hope that if someone out there is struggling with something they will feel that they aren't alone.