my boyfriends best friend is bothering me

i (f23) have been with my boyfriend (m24) coming up on two years. we have an overall healthy relationship and i’ve formed good friendships with his friend group. his friends are extremely close, like family / ride or die friendship. that being said, his friends are always around. this dynamic is unfamiliar to me and sometimes is bothersome, as we spend more time with his friends than we do just the two of us. this is an entirely different issue in itself but i digress. he has this one friend in the group that has been bothering me recently. i don’t know how to explain it other than feeling like im in some sort of competition with her. she always seems to be seeking attention from my boyfriend specifically. in subtle ways, but i notice it. for example, she asked my boyfriend to go wait outside the bathroom for her at a gathering when her own boyfriend was probably 2 feet away— kind of odd to me. another example, my boyfriend was showing me something in the kitchen and she loudly says “show me— i care too”. she just always needs to make herself known and seen in any way with my boyfriend. i don’t notice her doing these things with anyone else in the friend group. something that really stood out to me was when we were getting ready for an event, she was showing everyone her outfit she had planned and specifically called to my boyfriend and said “(his name), look” for his validation. she didn’t single out anyone else. these are just a few standout examples but there’s more i don’t even care to get into. now, maybe i just don’t understand their friendship dynamic. they’re a really close group of friends, guys and girls. my boyfriend doesn’t do reciprocate or do anything questionable, it is very one-sided and i don’t think he even notices these things like i do. she also is in a longtime committed relationship so, tricky to assume she’s doing all of this flirtatiously towards my boyfriend but i literally don’t know how else to view it. i’ve talked about this issue with my friends and they all agree it’s really bizarre and think it’s worth having a conversation with my boyfriend about— im just scared. i don’t want to come off as crazy or toxic. i also don’t want to seem like im coming in between his friendships. i just have been so bothered by this and don’t know what to do or how to even bring it up if i were to. please be honest if im being crazy or not. if im not crazy, how would i best approach this with my boyfriend?