We all act tough sometimes. There are times when acting tough can serve a purpose. There will be times when you need to set your feelings aside and push through something difficult. 
It’s OK to acknowledge that you feel uncomfortable, to ask for help, and to be vulnerable with other people. In fact, it often takes more strength to acknowledge your feelings or to admit to your mistakes.
It can be helpful to stop and ask yourself, “Is what I’m doing right now an example of being strong, or am I just acting tough?”
Once you recognize the difference, you can choose to start doing the things that help you grow mentally stronger.