Hi Honey!
I'm going through a similar thing to you but on a much smaller scale. Well done for losing 155lbs, that's amazing! I'd lost 56lbs over three years and then went on a massive 6 week holiday around Australia and New Zealand and gained 20lbs back, and then when I got back I moved to a new city, started a new job, and also began a new relationship back in my home town. So for the last 8 months I've been stuffing my face due to stress, and I've also been eating out a lot when my boyfriend comes to visit me, or whenever I go home to visit him and my family. I've gained an extra 17lbs on top of the 20lbs I'd gained on holiday. Being in a new relationship is great, but it's not so forgiving on the waistline! Haha.
I just wanted to comment to say I understand how you feel, and it's great that you've come back to Slimming World. I only joined a class again on Monday this week, so I'm still getting my head around the plan again, but I'm feeling so positive and excited! We can do this