I'm falling in love with my best friend. advice? (longish)?

so lets call him billso i have always been friends with him. but lately we have been hanging out A LOT. i was gonna go to Perkins with my friend yesterday morning because we had a 4 hour late start for school. so i invited bill and he invited one of his guy friend (who i am also friends with and he is my next door neighbor) i was gonna ask my neighbor if he could give me and my friend a ride but bill said he would give us a ride. so later in the night i texted him my address and these are the texts he sent:"why didn't you text me earlier? "and then i was like oh sorry"i was just kidding! i am so excited for tomorrow! i will pick you up around 9"so he picked us up and i was going to get in the back but he was like"No! sit up here with me!"then after school he said he wanted to hang out that night so i was like sure! but then he ended up not being able too. so we decided to hang out tonight (in a group..me, bill, my friend)(i dont have school today or tomorrow). so he came over and we ended up playing guitar hero 3. haha! it was really fun because he is like amazing on expert and me and my friend suck. so whenever i was playing he would try and distract me and i would yell at him and then flirtatiously be like"oh..since you were distracting me i get an extra 10,000 points!"and then he would fus about it but eventually give into my charm. haha. jk. so yea. me and my friend sucked it up really bad. so then he said that we should hang out again on Saturday so he can beat me again and i told him that if me and my friend practiced and got better and we beat his score (of course my score and my friends score would be added together..haha) that he owed me something. so then after he left i texted him and said he better bring his a game and be prepared to lose and i asked what he would give me if i won and he replied"Oh i have something in mind"what does this mean? i really like him but i don't know what to do..advice would be super!!we are 17 btw if that helps in anyway. haha. sorry this is soo long but thanks for the help!!

well im not going to read your wall of text but the easiest way would be to flat out tell him. Chances are he feels the same way and if not than he will probably try and forget it and progress with your friendship

Dudeeeee, he want's you nuts obviously. That's what I would do if I liked a girl.

he seems interested,just flirt alot and see how he reacts.