You could try keeping away from that guy in the mall. He's bad for your diet. >:-/
Motivation is overrated. It's either you do it or you don't. Simple as that.
To eat or not to eat?
That is the only question you should ask yourself if you want to lose weight.
View yourself completely nake in a full length mirror. Motivation.
Try recruiting a friend or family member to join you. You could motivate each other or maybe have a little competition to see who loses the most weight.
It's strange a bit! You whether you want or not want it! Someone who doesn't have a motivation won't do anything, so your question tells me you want to do lose weight and you almost have a motivation but you just don't know how to connect with it. You're thinking about with no doubt.
The first question would be is it truly necessary to lose weight ? Maybe you're fit already and overthinking with yourself.
But then, ask yourself, you considering to lose weight, all right , but what's the image you looking for ? The purpose ? The aim ? You wanna put time, effort and work hard to what end ? That end and the final image is what your motivation should be.
People lose weight for being fit, what being fit represents ?
-Healthy lifestyle -Healthier body -Looking more sharp -Dresses fits on you better and sits on your body more suit and many more! You need to keep your eyes on the prizes and build up yourself psychologically to keep to the path, none stop till you reach the prize.
If you want to be healthier and happier ... You owe it to yourself to be a healthy weight. No one can make you want that .. Except you.
The obvious answer is to get a personal trainer, but those can be expensive, they make apps to help motivate you and help you lose weight there are also a couple websites where you can live chat with a real body builder to help motivate you
The fact that you posted this question suggests that you are not happy with your weight and you want to change.
That is motivation enough.
Don't push yourself hard about that you should lose weight and start to live a peaceful and balanced life. Do what makes you happy. If you feel good, there is no point of pushing yourself to the limit just because someone said that we all have to have abs and big muscles! Do sports, but only because it is healthy.