Major Backslide!

My son got the wii fit for his birthday. We were playing around with it and I decided to do my profile. I was shocked when I saw how much I weighed. And my BMI! They pretty much classified me as at the very top of the Obese category. They may actually have wanted to put me passed the obese category but they didn't have a higher category. I thought I weighed 234. That is where I've stayed for awhile, but they weighed me in at 241. I didn't believe it so I went to get on my personal scale and low and behold, 239.5. Not too far off! This is just awful! I give up on being healthy for 2 weeks and I gain 6 pounds! I've got to stop this madness! And to top it all off, my aunt is coming to visit. I haven't seen her in over 5 years, or, as I like to say...I saw her 50 pounds ago! 50! She's not going to recognize me and I have to actually socialize with her like I don't know that she's trying to calculate how much I've gained. You have to understand the dynamic I've always had with my aunt. Whenever we visit, we always talk about weight loss and healthy eating etc. The last time I visited with her, I had just had my 2nd son and was trying to lose the baby weight. Instead of losing baby weight, I gained 50 pounds! I weigh now what I weighed 9 months pregnant with that son! I'm just mortified, but there's really nothing I can do. She'll be here in a week. I don't know why I keep on riding this roller coaster. On, Off, On, Off. I just want to feel better about myself. Why can't I ever stick with something long enough for it to work? I need help! I just need to start somewhere.