My girlfriend has a best guy friend!?

Well it depends really. i had a best friend we were inseparable, until he started having feeling for me, and it turned awkward. if ur gf loves you then she wont do anything with him, but he may feel something for her. again if she loves you and this does happen she wont do anything. all you can do is trust her and hope for the best

sounds like the obvious!

but there is a possibility that they are just friends!
Yes... it can happen...
but... i suppose the only thing that you can do .... is chill.
you have to accept it whether you like it or not.
Even if something did happen.... you still have to accept it.
It is up to you to react maturely and or properly !

so... right now... to act maturely about it.
Accept it, trust her. act cool about it.... and well.... she'll admire you more for being so cool with it.

however, don't be afraid to reciprocate the situation either.... nothing stopping you from having a female friend either.... and if it bothers' her... then i would question her integrity with her guy friend....

anyways.... good luck !

being 16, sharing a bed with a girl alone sounds like something more than friends. Sure it may be innocent, but talk to the dude, tell him the very famous quote "keep it real man" because you shouldnt have to feel paranoid and worried every time they hang out. Just remember to not sound like you are controlling anyones life, just ask for it like a favor. Explain that it bothers you, makes you feel uncomfortable. It not an unfair thing to ask for, if they get mad at you (approach both of them but individually at first) give them a parallel example, ask your gf how she would feel if you were just chilling with some other girl at night on her bed, ask the guy how he would feel in your shoes.

Honestly It would bother me, it doesnt seem right and the picture doesnt fit. A brother doesnt necessarily sleep in the same bed as his sister, and explain that, it feel wrong to you and they should at least explain

i've been there
to me it sucks lol cause i trust my girl but i never trust other guys
you are fine if they have no other intentions

but sharing a bed..is a bit much...like wtf.. lol

I'm 19 and my boyfriend has a best girl friend. I do not have a problem with this at all. She's a really great person, but would I let them share a bed? No way. I have no issue with her ever staying over his house, and she has before. We're all friends but sharing a bed is outside that boundary that my boyfriend and I set. He is always asking if I'm okay with them being so close and I am. I trust both of them and know he loves me. It's about trust and communication. You both need to talk about the situation and see what works for both of you and the relationship as a whole.

i think you're just overreacting. i'm 15 and i have a bf and a best friend who is a guy. me and my best friend talk on the phone every night and hang out and we tell each other everything. there's nothing going on between us, we're just really tight. my boyfriend gets really jealous sometimes, which is normal i guess. just talk to her about it and tell her that it makes you feel uncomfortable, but don't ever make her feel like she has to choose between you two.