Weight loss and insecurities.

Soo I’m 5’9 and currently weigh 145 pounds. Which I know is a healthy weight for my height. I am now down 70 pounds but still have major insecurities in my body. Everyone around me keeps telling me and pointing out how much weight I’ve lost or “how good I look” but I don’t see what they see. When I look in the mirror I get physically sick to my stomach somehow at 145lbs I feel more insecure than I was at my heaviest 215lbs. The weird thing is I see people that are the same height and weight as me and I feel like I’m double their size, I don’t get it. Also while I’m here venting I’ll bring up the idea of loose skin. I’m terrified of it. My boobs already deflated and got saggy from the weight lose but I don’t want my stomach to do the same I don’t know if it’s in my head but I already feel like I have some. Any advice or encouragement or thoughts on anything I mentioned are welcomed.