i hate my weight, but my friends think im thin. I've never actually gone a day without eating but i hate being made to eat and get nothing out of eating. I also suck in to hide my tumy and ppl don't know this. advice???

Unless your eating total junk food you never 'get nothing' out of eating.  Eating is not about psychologucal satisfaction.  Thats part of it, yes.  But whether you are enthused or interested or not, your body needs you to eat regularly.  You eat to provide fuel for your entire body to run on.  Without an appropriate amount of caloroes to kerp heart, lungs, brain, muscles, netvous system, kidneys, liver, etc functioning correctly - they cease to do so.  Eventually you can reach a point your body will turn on you and start working against itself    Without enough calories and nutrients from food your bosy will begin to digest itself until your organs fail and? Yes, you can die.  Let me tell you,you are sounding bordeline anorexic  Definately eating disorder territory.  If others say your thin then you most likely are.  Your oerception of being 'overweight' is a psychological distortion due to oncoming disorder.  Your body schema is warped  Anorexia and other such things are very dangerous.  They are psych disorders than can and do lead to death.  If you are 'sucking your tummy in' because you think its 'fat' your likely wrong.  You may have weak abdominal muscles that pooch out but thats not fat.  It means you nead to tighten up those muscles.  You can have zero fat and still have a poochy tummy with loose muscles.  Do sit ups and do your body and brain a favor - eat.  Eat healthy, but eat.