Saying 'real' expresses the feelings that you want to express but you can't. It also means how much you went through and you still keep pushing knowing you can't. The word comes from the song (12 Stout Street - Rx Papi)
The term real in this way is mainly used in tiktok comment sections usually under a CoreCore video, these videos tend to expose todays world and seeks to show the worst, people say real to show they agree and understand the pain