Other girls..

Okay so my boyfriend has a lot of friends that are girls. Which I'm okay with, I have a lot of guy friends. But this one girl I have a problem with. She's the ONLY one I have trust issues with. She's constantly commenting and liking my boyfriends things and always talking to him. I don't mind that he talks to her but it's just always. She's way too friendly with him and I have a problem with it. She has her own boyfriend. Why can't she talk to him 24/7? 😳😒 and I swear she does some things just to purposely make me mad. And my boyfriend doesn't get on Twitter a lot but I just was just looking at his profile and his profile picture was of him and thus girl. I told him how it was bothering me and he changed it. But he didn't see anything wrong with it. Should I be worried about this other girl as much as I am? I don't trust her with anything. I wouldn't trust her for anything.