Is it strange my boyfriend has his female best friend as his lock screen on his phone?

leiladunnn97
Maybe I'm overthinking but he's cheated on me in the past.
I know for a fact he went to school with this girl and they're in the same swim team and they're absolute best friends but he has this picture of her where she modelled a swimsuit (one piece, nothing revealing) as his lock screen.

i feel a little uncomfortable but is that something guys don't really think about?
Like I have my best friend as my lock screen but she's same gender and she's pulling an ugly face...
Updates
+1 y
We've been together a year. I guess I stayed because I'm weak haha he realised that he messed up and still tries to prove himself to me but now I'm just overthinking every female in his life...
Is it strange my boyfriend has his female best friend as his lock screen on his phone?
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