A guy my girlfriend is friends with tags her in memes and they send memes to each other all the time. Should I be concerned?

My girlfriend and this guy send each other meme photos, they dont message each other and ask how they are going etc. they just send each other memes, I've seen some of the memes they send each other or he tags her in. Should i be concerned? She doesn't reply or reacts back to them. she's been sending him memes way before we got together and they dont flirt, but i still feel like something is up. Like tags me in stuff too, but i still feel generally concerned
A guy my girlfriend is friends with tags her in memes and they send memes to each other all the time. Should I be concerned?
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