errrrm you mean a bonfire? but yea, idk why I might just be strange but I loved it when I was sitting down talking to someone and she ran up and tackled me on the ground and kissed me and laid there next to each other and just "snuggled," looking up at the stars and having her close to me hand in hand, made me feel on top of the world.
dont be to close to the fire and shrug your self in his arms and just kiss him.. bomb fires are romantic.. but if you are a young in then let him make the moves on you im sure he will just dont have sex without a condom....
Don't overthink things or look like your trying too hard. Make it genuine. Start small like holding his hand, hooking your fingers in his belt loops, or play with his hair. But, don't hang all over him either. Make him want you!!