Everyone likes different body types. If they didn't then there would be a lot more single people in the world because only body type "A" would be spoken for.
The biggest thing that needs said here is regardless of whether you are losing weight to look good, attract a new mate, fit smaller jeans or whatever your reason....the side effect of that weight loss with be that you are a healthier person. And just to clarify simply being a thin person doesn't guarantee your health either. My own dad is 5'6" and about 155-160lbs. Very average built guy. Very active 60ish man. He has high cholesterol, is borderline diabetic and has had skin cancer. He has never been overweight. Never smoked one cigarette and I have never known him to take a sip of alcohol.
To compare being overweight with being a drug addict is not a very fair comparison. Did a drug addict need to start using drugs to live? Nope...didn't think so. But you do need to eat to live.