<human>: Can you succinctly summarize the text in 1-3 sentences?

Last year around Thanksgiving I found out that I have diabetes. I immediately started a diet of about 200 carbs or less a day. I haven't been that strict about it, but I've been turning down most things that I know I shouldn't eat. Cutting out pretty much all sugary foods. When I weighed myself about a month before Thanksgiving I was about 435 lbs. and gaining. In the last month or so I've had about 15 people tell me I look like I've been losing a lot of weight. I hadn't even really been trying to lose weight, just trying to manage the diabetes. Yesterday I finally looked in the mirror and noticed it myself. So I got out the scale, put a new battery in and weighed myself. 339 lbs. I couldn't believe it. I had to get on and off it like twenty times and weigh my girlfriend just to make sure my scale wasn't lying. This is the first time I've lost any significant weight. I am really excited and encouraged. I can't wait to hit the swimming pool this summer and add a little exercise to the dieting. I'd really like to get under 300 this year. I didn't think that was even a realistic goal a year ago. Now it's only 40 lbs. away!
<bot>: I accidentally lost about 100 lbs. by managing my diet so I don't die from diabetes. (Sorry I don't have pics, this kind of came as a huge surprise so I wasn't prepared.)