I've given up

Here's my problem, I'm 17, 18 in October. I'm 5'8 and never in my life have I ever weighed more then 113 lbs. I hate how skinny I am and though people tell me all the time that I look alright...I just can't force myself to find beauty in being bones. Day by day people comment on how skinny I am, and how I need to gain weight..like I'm trying here! I eat like a grown ass man and have tried everything I could find to gain weight. From stuffing my face constantly to pills and stuff, yet Nothing changes. I'm beginning to hate myself and even looking in the mirror disgusts me. Like I'm not bad looking or anything... I'm just...too skinny. I wanna be seen as a happy HEALTHY looking person.. Not a walking skeleton.