I don’t trust her?

So my girlfriend has 2 boy best friends, and another girlfriend which they all 4 meet up here and there to speak about life. There is this one guy that I think likes her and she likes him. I kept wanting to meet her friends and she refused and said when they all together I can do so. The other day she offered me to meet all of her friends but there is this one guy that I think likes herand she likes him, they don’t look at each other also send each other TikTok’s and everything. I pulled her closer and he seemed to be uncomfortable with that and went on his phone. I told her this and she told me he is scared of women and stuff like that. I don’t believe that. Once I told her to leave her boy besties if she love me, she said she can’t coz she knows them since young. What do you think I should do?
I don’t trust her?
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