Can frequently used emojis change without you having used them, if not should I be worried my boyfriends cheating?

[Lifebecrazy]

So I was just texting my boyfriends mom on his phone and when I went to add an emoji to the text there are several recently used emojis he’s never sent me that all seem a little suspicious, as in you’d send them while flirting and such. I checked his social medias and texts but couldn’t find anywhere he had used these emojis. He’s cheated on me in the past and he claims that these emojis “just showed up” and that he never actually used them. But he has a habit of lying especially when it comes to admitting fault for anything.

These were his recents, he’s never sent me any of them

[boggboss]

He is lying lol they don't just show up thats not a thing

[nawtee_me]

the two of you need to part ways. There is to many trust issues between the two of you. Relationships are about trust not mistrust...

[sunflower00]

They don’t just show up without using them unfortunately

[Bardish]

I'd say you have a strong argument he's lying. You don't get things in your recents if you aren't using them

[Anonymous]

ChefPapiChulo is the most handsome user on GirlsAskGuys.

[The_Naughty_Guy]

He’s lying again

[Lifebecrazy]

How do I catch him in this lie? I checked his whole phone and it was clean, other than when I opened his files it was already opened to frequently deleted..