Help me, please! :(

Some of you might have read my other question. And if you have, it might help. There's this other boy, who has been my best friend all of my life, and we always do everything together, and he's really loyal. I was talking to him the other day, and he said: "I couldn't bare it if anything bad happened to you." and i've always had a special feeling whenever i'm near him, and lately i can't stop thinking about him. But when he said that to me, the boy who i talked about in my other question heared, and he looked really sad and he walked of. Then a few days ago my best friend text me, and he said: "I love you, i always have." But on the same day the other boy text me and he said: "I've never felt this bad in my life, i couldn't live without you. I was using your friend to make you jealous, but now i know how awfull it was of me, and i'd do anything for you to forgive me. I really love you." :L What should i do!? Thanks :)