He lied about his age???

Me and this person been talking for almost 8 months now today on his Facebook page I decided to look at his old statues and through some of his pics and I found one picture where his mom tagged him in where it was his birthday and it said “Happy birthday to my oldest child who is 26 today” which was in 2015 and he supposed to be 26, and I’m 21 what should I do about this? 😐