My boyfriend bsf girl?

So my boyfriend bestfriend had a crush on a girl but the girl crush on my boyfriend instead and the bsf knew anyway but apparently the girl develop feeling for the bsf and they start dating recently I didn't mind cause I thought yeah maybe it's just a small crush that she already over it but the first time my boyfriend introduce me to his bsf his girl was with him and his bsf was cool and I give my shake but he fist bump me again I didn't mind cause maybe his girl got other boundaries but during the whole meeting I couldn't help but notice how the girl eye was on my boyfriend the whole time and how she was blushing everytime he look at her face I didn't want to sound like a jealous crazy girlfriend so I didn't say anything until recently this girl start recreating me and my boyfriend pics and how her boyfriend was dressing like my boyfriend now I get everyone had there own style but even his haircut and shoes were literally the same I just get creepy vibes from this girl I don't know what to door or if I should tell my boyfriend about it
My boyfriend bsf girl?
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