hey, okay so the same problem happend to me so i have some expreince with this stuff lol, heres what i think you should do, sam is the one you like so find out if he likes you by like asking you friend to ask his friend to ask him if he likes you or something cuz you dont wanna make it to obvious that you like him, and if he likes you thenn tottaly go out with him! but, if he doesnt they you always have david the swimmer who you already know likes you:) i hope i helped.. i wish you luck!!