Hi!
I completely understand. Began at 331, have now lost a little over 100lbs, and am looking to lose the last 70 or so.
I'm so glad to hear you have a supportive fiance! It's very important.
Remember to keep going no matter what ^_^
Be sure to check out the different areas. There's the 20-somethings, the 100lb Club, the 300+ area, and sections for different plans under Diet Central as well. Post wherever you're comfortable!
Best of success!!!