Do you struggle with a mental illness? People will tell you to suck it up and keep going. You don't need treatment. You just need some gumption so you don't flake out on your responsibilities.
Other people can't see the pain, so they may not think that it's real. Haejin Park illustrated 7 common responses at BuzzFeed. When you meet people like this, block them out of your life if you want to get better.