Regained lost weight in 3 years

I feel you. I've been through the same thing and it is really frustrating to see you working towards something you already had in the past. I was able to pull out so much more on my last weight loss effort than I am now. I still WANT to lose weight, you see, but my willpower just got lost over the years. I think my problem is that I don't have a goal now. I work the best when I have a clear target on the horizon, something to aspire to.

Might be worth considering why you stopped the last time. For instance, for me, I got to the edge of normal weight and even though I was in the "normal" weight range, I didn't look by any means the way I thought I would. In my eyes I still looked overweight even though by the number of the scale I wasn't. I know the main reason for that is that I have a very high fat percentage but I just couldn't find the power to go on - reaching what I thought would be my first out of three goals and not looking the way I imagined at that point was frustrating and demotivating. I'm having a hard time now because it feels like I'm working towards something unrealistic.

Finding your own reasons might help you understand why your attitude has changed. Additionally, you need to find something to work towards. I'm experimenting with a reward system to motivate me, because the long term goal (due to the reasons above) doesn't do it for me anymore. It's a new concept for me so I have no idea yet if it will work and help me stick to my goals in the long run but here it is - I've came up with several little rewards, written them on paper and put them all in a jar. For every kg lost I fish one out. I also have tiny daily rewards for sticking to my calorie goals and bigger rewards set up for certain milestones. If you're a binge eater like me, make sure you don't use food for reward, in any form.

Examples of my daily rewards: 1h guilt free "me time" for doing anything I feel like or nothing at all, bubble bath, movie night in, small money towards something you want to buy, home spa (facial mask etc), 1h guilt free TV, 5min bubble wrap popping, etc.
Examples of small rewards: mani/pedi, money for clothes shopping, cinema night out, new piece of workout equipment, new piece of workout clothing, visit to hairdressers, new cosmetic product, new book, etc.
Examples of big rewards for meeting your goals: I especially enjoy ordering a service for something I don't like doing (for example if you don't like cleaning order a cleaning lady or if you don't like washing and ironing get your clothes to the drycleaner), and spending the day doing something I do like (like going shopping with the money I "made" from the small and tiny rewards). Other than that it can be a purchase of something you really want, a spa day, an adrenalin day if you're into that (like parachute jump or baloon flight or piloting a small airplane or paintball or anything else that's a great experience for you).

Hope this helps