Sharing rooms on holiday

I‘m going with two girl friends of mine and one guy to Sweden to visit a friend of us there very spontaneously. One of the girls randomly booked our rooms and we share an apartment for 3 days but for the first night we‘re staying someplace else which is why she booked two hotel rooms. I figured it probably is gonna be me who‘ll have to share the room with our guy friend because I‘ve known him the longest and he‘s closer friends with me than the other girls. But the thing is me and the other girls all have boyfriends and now I‘m unsure how to handle the situation. I don‘t want to make it dramatic because my friends are very relaxed and laidback and I trust him as well, I just don‘t know whether my bf would approve. I personally have no issues with sharing the room for one night because I‘m 100% certain nothing will ever happen between us, but I don‘t wanna make anyone uncomfortable. It is too late to book another room too, because it all happened so fast and we‘re going there this week.

Is it crossing a line?