Dawn,
This is exactly how I felt for the same length of time. After years of denial and trying to fit in and about a little more than a year ago, I finally had the courage to admit to myself what I needed to do and make a plan for the desired result.
Remember: Make a plan, work the plan and don't look back!
In 2 days, on Thursday, I will have SRS. My only regret at this time, is NOT doing this 50 years ago.
I will keep all my sisters posted, when I am post-op.
Yes, I know this was posted in the crossdresser forum, but really are we not all struggling with similar, if not identical issues? Just do what you need to do!