fwb??

So I'm sort of talking to this guy I'm very confused on my feelings because I'm 19 and have never been in a relationship but he's understanding so we're just seeing where things go, hanging out and stuff taking it day by day whatever. Well my best friend is also a guy and I lowkey wanna just have like a one night stand or something w him something that doesn't necessarily mean anything but just for fun bc if things become super serious with this other kid I don't wanna have been tied down right from the start like I haven't even had a relationship. Butttttt I know my best friend wouldn't be that way towards me also probably bc he doesn't wanna be the one to be my first time since when he took his exs virginity she went psycho over him. Moral of the story is I just wanna fuck him to fuck him for fun and bc I'd be like 10000% comfortable in front of him but like UGH! I doubt it'll ever happen