6 mo old refusing food..

Hi moms.. my 6 mo old usually love to eat puréed fruits and veggies.. but since a couple days ago he hasn't been wanting to eat them? I get the purée ready in his bowl, sit him down, start feeding him and he will kinda push it out with his tongue ( he's been into sticking out his tongue a lot lately) I'll keep trying but I notice he doesn't really enjoy it like he used to.. he then starts to get fussy and wants to get out of his chair. I try feeding him again and he turns away and cries.. idk what happened? He was doing fine before. He loved to eat and would open his mouth wide for the spoon.. anyone else dealing with this??