What do you do when your ex hits you up?

Melie
So my ex sent me a message today. I am not thinking anything of it so I replied back. My mistake. It's been almost 2 years since we broke up. (He cheated). Well I have been in a relationship ever since 1 year 4 months. He is now married.  He requested a picture of me because he misses my smile. 😂😂so I said ok sure so I sent him this. 😂 and he never replied back.