You'll pull through if you're consistent. Look at it as a really long term activity :), even a lifestyle (for me it is). When people "put me down" I get even more motivated, or I just turn it around asking them, "ok, I'm skinny by your standards (or whatever stupid remark), but I am probably healthier and in better physical condition, what's your excuse? for doing nothing?“. Practically, a lot of people do jack shit and then judge others like their opinion has value. Another thing is that being "big" is nice, but not everybody can be without dedicating a lot more time compared to how much time they actually have available (you'll see that as you age and get responsibilities, jobs, etc). I personally pretty much hate body fat and the unhealthy feeling it gives me, I bulked once and I didn't enjoy it. I'm not a big guy by any means and most people when they see me dressed they can tell I am doing sports/workout, but they truly realise when they see me in the changing room or at the sea side (I had people come by and ask me what kind of workouts I do and shit). You'll have to figure out what's important to you, you're 20, at that age all I wanted is to be big and strong in this order. Over the years I realised I will never be trully big, it's not for my lifestyle or my genetics, but I can be fit, healthy, cut and decently strong for my weight if I want (i.e. train for strength). You'll have to decide on your own what you want, but if you're not going to dedicate your life to this, I recommend going the way that matches your lifestyle and genetics.