Our stories are very similar!
Like you, I have been "the fat girl" my entire life. I can remember being as young as 5th grade and obsessed with how huge my thighs were. I remember being teased for being big all through junior high. I remember going shopping with my girlfriends in high school and being so ashamed because I couldn't wear anything at the "normal sized" shops they went to.
I did date as a teen but my self esteem was always awful. When I hit college, like you I decided to own being a fat girl. I had more self confidence and I decided I didn't give a rip if someone did like me for me- fat and all.
...but then I had my first child at 21 years old...and got bigger and bigger. Over the years I ballooned up to over 400 pounds. Any self esteem I ever had was long gone and my health was seriously tanking fast.
My best advice is to let go of that "fat girl" mentality. Too often we wear it like a suit of armor not a badge of courage. We're teased and tormented so severely we try to muster up all this false bravado to shield ourselves from being hurt yet again. It is simply wonderful you're doing this for your health- but you have to be ok with the fact there's nothing wrong with doing this to look good, too. You're not letting society or anyone else "win" by getting the Lap Band and losing weight. YOU are winning for taking control of your health so you can live a long, happy, healthy life with your husband.
Best wishes to you