<human>: Can you succinctly summarize the text in 1-3 sentences?

I'm an introvert, and I am usually sociable when I am around my close friends. I have asked questions to them how to make friends in my new college and they all think I'm bluffing because from their POV, I'm quite a social butterfly. However, that is only true if I'm around my close friends as I am comfortable and safe, which as a result I can easily be one of the talkative ones to any strangers/acquaintances that joins our group events/hang outs. 

On the other hand, I'm not close to any of my boyfriend's friends except I can keep up a conversation or two with my SO's best friends. He also has a few girl friends whom he is close to and I just feel intimidated and awkward around them. 

Do any of you feel or have felt this way? I must admit I feel threatened by his girl friends when I shouldn't be. I do think they are gorgeous and perhaps that is a reason I close myself up? They all have SOs, I trust my boyfriend and he has reassured me in the beginning of our relationship that he treats them just as friends (he had a big crush on one of them before but not anymore.) 

Anyway, how do I gain the confidence to speak up or at the very least not feel so awkward or out of place in these kinds of situations? Thank you so much in advance.
<bot>: I'm a social butterfly around my close friends, but just by myself or with everyone else I'm an introvert. Any tips on how to get along and not be so awkward with another SO's friends?