How can i prove i want just friendshid with him! when i really dont!?

Okay..... so about last year 09 NOVEMEBER i started going more in more around my bestfriends brother. I use to see him all the time and think nothing of him when we would go over to pick something up or drop something off!!! WE WERE all friends joked around and had fun laughs thats IT!! id never wanna kick it i was pretty much in my own little world! well comes decemeber and i started hangin out and start getting to know him more in more which (ive known him for like 5 years!) BUT!! started noticing his personality more in more And was like DAmn im diggin this guy! which was relly weird cuz i never felt this way about him.. we hung out more for about 1 month straight then finally one night we hooked up( kissed& flirted) THATS IT!!! he was txting me i was txting him! we hung out for 2 weeks after tht! then really HOOKED UP!! feelings got into play! then theres comes A holiday and i asked him to be there uz obviously i was diggin him! & he said he would... tik tok... tik tok NO sign His phone died!! so i left a nasty voicemail! then woke up in the morning like ohh ****!! so i said sorry!! i was mad and a lil tipsy! everything was fine after that.. So at this time were pretty much dating! 2010 of febuary i had a concert we were suppose to go too and we had it all ready down to the last minute then he flakes!! so i got pissed and freaked put again! come on thats only normal! so i wanted to just give up! and call it quits.. But now my feelings were involved! i went from txting him everyday to txtin once in a while! he just stoped talking to me all together! he ignored me for about 3 months.. Now about 2 weeks ago i finally seen him again and it was like BOOM!! a lil feelings came back buT the rest of them are still kinda hurt! BUt over it at the same time. He fells its a lil weird cuz im not somegirl he hooked up with and can leave im in the circle with my bestfriend which is his brother! So now im trying to just be friends and relax take it slow to gain that friendship zone back!! but HOW?????? Or should i even maybe try to rekindle the relationship!!! we were o hapy and nothing but smiles! Thats all i think of but we can be friends and have the same smiles right?????