This shows that he still likes you and can't adapt to life without you. The content of the signature is always about love, isn't it a little sad? I think this is an outward action, because when we broke up, his heart suddenly became empty, and he had feelings to vent, but no one could share the pain. In real life, he has no friends to talk to, so he uses this subtle way to vent his inner thoughts, which is the normal performance after lovelorn.

I hope I can help you (_)