Be grateful your metabolism is lightening fast. Some of us aren't so lucky and have to work extremely hard to keep the weight off.
I would recommend you to eat more than 2500 calories. It could be a lot of junk food or small servings of food that possess high calories without being junk.
It is. I was always so skinny and I ate so much, plus I eat junk food almost every day I only started gaining a bit of weight the last 2 months. I started taking Creatine. Not sure if that helped or if the junk food is catching up, but it's such a nice feeling when people say I look fatter
99% of the time, "naturally thin" people stay skinny because they simply don't eat that many calories (either because they watch what they eat, or because they simply don't have a big appetite), not because of some magic super metabolism
Guaranteed, if you eat over your daily caloric needs (calculate here) day in day out, you will gain weight
I know, right? Wanting to get some body is tough when you have a high metabolism but I feel like if I cross the line and force myself to gain weight then I'll never get my metabolism back.
I'll enjoy it while it lasts.
I feel you. I'm 17 and only weight 51 kg, I'm so skinny I've always been like this and I'm insecure about it. I want to put on some weight but I can't go to a gym or drink protein shakes and I don't know how to work out at all. I'm clueless and destined to be a bag of bones for eternity.
Eat pizzas and burgers and mcdonalds. It really helps
I've tried. Doesn't work. I actually tend to lose weight the more unhealthy I eat. My body knows when I am trying to sabatoge it and speeds up my metabolism. It's ********.
But I mean at the end of the I'd rather be skinny that the other option
I only started gaining a bit of weight the last 2 months. I started taking Creatine. Not sure if that helped or if the junk food is catching up, but it's such a nice feeling when people say I look fatter 
I've always been like this and I'm insecure about it. I want to put on some weight but I can't go to a gym or drink protein shakes and I don't know how to work out at all. I'm clueless and destined to be a bag of bones for eternity.
just eat healthy and go to the gym!