Guys, Is this a sign my husband could be cheating?

My husband is an addict and constantly has to run around and talk to people I don't approve of but recently he's been very paranoid about me cheating and flirting with other men meanwhile I found a single girl in our area on his Facebook and deleted messages from her on messenger. He says he deletes anything incriminating and he just hits them up for shit he needs but when she messages him today I saw that the normal thumbs up emoji set for all chats is changed on his end to a black heart. Why would that be if he wasn't having inappropriate conversations. Just want a guys opinion. The message from her today said "where ya at" and he name and then she tried to call him. If i had set a chat emoji to a heart he would be insta pissed. Is this out of place or just me?

Guys, Is this a sign my husband could be cheating?
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