Why am i losing weight but still have fat on me?

So you are 18F, 165cm and 50.5kg. For other USA-ians like me, that's about 5'5" and 111 pounds, a BMI right on the border of underweight, technically - BMI 18.5. BMI isn't gospel, but it gives us a hint where things probably stand.

I have a hard time believing you have high body fat, honestly, and I'm saying that as a woman of almost exactly your height myself. I can understand that you may not be fully satisfied with how your body looks. Many women aren't.

There are several possibilities here, and it's hard to evaluate what's most likely without a photo.

For one, we're supposed to have some body fat. It's unhealthy to have too little, especially for women.

It's possible that your body hasn't reached full maturity yet, at age 18. That may be relevant, because our bodies change shape as we mature . . . even after we reach full adult height.

I'd also say that the image put out by online influencers about what women should look like is seriously distorted.

My best advice to you to put yourself on a path toward lifelong thriving would be not to lose weight, but to eat nutritiously and do progressive strength training to add some shapely muscle to your body. As you do that, you might even need to add a bit of weight to get the look that's generally considered most attractive these days, because a pound of muscle is more compact than a pound of fat, so a person with more muscle looks leaner.

If you stay at steady or even slightly increased weight, and strength train faithfully, you will gradually use some of your existing body fat to build muscle, and will therefore look leaner. You won't get "bulky": That requires illegal performance enhancing drugs and years of work, typically - not a thing that happens overnight by accident.

Strength training and nutrition is how any of the fit, lean online influencers have built the body they're showing online now, even if they lie and tell you they did it with the special program they're selling. On top of that, many/most of them have used professional photographers and editing tricks to look the way they do in photos and videos. Don't fall for their high-priced nonsense. They only profit if you don't succeed in your body goals, but instead keep desperately paying for their unproductive advice over and over.

Get on a better path. It will take time and patience, but at your age and stage strength training is a more productive route to a fit attractive body and attractive, thriving good health.

Best wishes!