I need tips to stay motivated

I am a yo-yo dieter. I haven’t done a specific type of diet in a long time, I’ve done so much research that I KNOW what I need to eat and do to lose weight and stay in a calorie deficit, that’s not my problem. My problem is that I can only stay motivated for maybe a month at a time before I give up. Suddenly, my mind set will change and I’ll think “I’m okay, I just want to eat what I want for a little while” which turns into a month or even a couple months of complete binge eating. This back and forth process has led me to maintain my weight for five years now. Recently, probably due to the holidays, I put on ten lbs and decided, yet again, it’s time to “get serious”. I’ve been wanting to lose about 30 lbs for the past five years and just can’t do it. I don’t know what to do when I lose hope and give up on myself. I don’t know how to change my mindset and continue on the right track. Does anyone have any tips or pointers on what helped them to stay consistent? I know I could do it with at least five to six months of consistent training. I already work out a lot but I have to keep my diet clean and for some reason I just can’t stick to it :( I want this time to be different for once, I want to see a real change. Thank you in advance.