How do I stay consistent?

Only you can do that. Have a plan and a routine and stick to it. I've found for me the enemy of weight loss is randomly eating whenever. Have set meals to eat. Abide by them. Get you're routine going, and if you force yourself to stick to it, it will become automatic.

It depends somewhat on what you mean by "can never stay consistent", and on your personal "why" for that.

Sometimes people think they need to be exactly perfect on exercise, nutrition, and calories every single day. If they slip one day, they beat themselves up about it, maybe blow off the rest of the day or week, maybe even give up altogether.

It's not necessary to be exactly perfect every day on any of those things, ever. Pretty good on average can work fine. Furthermore, chipping away gradually at getting a little bit better in one's habits can lead to good results if a person sticks with that, adopting one or two new positive habits, practicing those until they're semi-automatic, then picking some other positive changes to make next. Rinse and repeat. It adds up.

Way, way too many people arrive here thinking they need to revolutionize their eating, follow a restrictive set of eating rules all the time, eat only "diet foods" (which they maybe don't even enjoy eating), totally give up treats forever . . . and then they stack a bunch of punitively intense, unpleasant daily exercise on top of that. That doesn't end well, but it usually ends quickly.

If something like that has been part of the problem, one answer is to make a simpler-to-follow plan. Misery is optional, generally.

If logging all your food is unrealistic for you, don't log it. I'm old enough to remember when calorie counting by food logging was not at all practical, had to be done with pen and paper. No one stuck with that, as far as I know. But people lost weight anyway. They cut down on foods they knew were high in calories like fried foods and baked goods or candy, ate other foods they liked that they knew were more filling, kept an eye on the body weight scale, and adjusted their habits as needed to see gradual weight loss. I've done it myself. Calorie counting is more predictable, IME, but it's not the only path to success.

Maybe none of that applies to you; I don't know. If you say more about what bumps in the road limit your ability to stick with your plans, and about what plans you've tried, other people here will try to help you with those specifics, including me. We're not going to be jerks about it, generally, because most of us have been there, many of us have successfully lost weight and gotten healthier/fitter, and it was Such A Good Thing that now we want to help others. That's my motivation to post, certainly.

Best wishes!

Meal prep works.

Plan ahead, cook ahead, log ahead. Eating is the last part. You'll feel less stressed since the whole thing is planned by the time its meal time.