^^ He always talked this kinde of things about social media, he doesn't change so she can't be suprised or hurt by his words. Besides, I guess it didn't have any deep meanings because his friends (including Swedish Mafia) always post selfies even Fares Fares and I'm sure thay know what Alex thinks about it
ETA. Ladies, I guess that if they broke up a while ago she has a new boyfriend (she always has), it could be that guy who was sitting next to Alexa's friend at Wimbledon (I think that I saw him very recently on instagram or in instastories one of Alexa's friends)

so I don't think that her posts have any meanings.