Should I let it rest or tell him?

there's this girl that keeps posting about me and the guy im talking to, she's saying he downgraded and that im ugly. But he keeps talking to me and apartently he doesn't like her but he is her #1 on her bsf list. She posts about how cute he is but i assume she's talking about him and me because they all relate to us. Should i tell him about my suspensions of her trying to get close with him or leave it
Should I let it rest or tell him?
Post Opinion