My best friend is going back out with this guy from 6 months ago but i like him? help!?

ok so my best friend rachel (not her name dnt want to say lol) started going out with this guy name cory (not his name) in the begining of the year like in november or october...and then after that she had problems with him and they kept breakin up 4 times ..and then they stopped and her parents hate cory because her step brother and him hate each other and now after that ..a few months later i went out with him and then my other friend erica (not her name) she got involve in my relationship cuz she likes him i guess but now shes over him so it only lasted for 2 days but i still liked him still ever since of that...and then i find out my friend rachel still liked him ever since they broke up but she said she was okay with me and him going out cuz she took my ex bf before. and now she went with one of my guy friend joe(not really his name) and he thought it was gonna last a long time but it didnt because she was also she was good friends with my guy friend joe and she didnt feel like she liked him as bf and she liked him more as a friend.and then now hes mad at her cuz he found out that she likes the guy i like and hes best friends with cory so now.. me and cory kept talking on the phone all the timee and when he went out with my other friend casey since she couldnt be on the phone alot and she was old fashion kind of person when she has relationships but he would call me all the time and he would talk to me almost everyday..till now hes going back out with my friend rachel cuz she likes him now ..he said he was thinking bout going out with her again cuz he sorta likes her too and i thought me and him would have a chance because me and him were talking all the time and sometimes aftr 4th period we would walk together and talk sometimes or at lunch or recess..but now there back together and now hes probably not going to talk to me anymore cuz hes gonna be busy talking to rachel..and i just found out they were going out yesterday from my friend jenna (not her name) and iwas heart broken i didnt know what to do cuz ik there prob going to be going out for a long time and i wont get to talk to him at all cuz he will be busy talking to her...and rachel hasnt told me yet ..but the thing is cory and rachel are making this a secret ..there not telling her step brother or anyone not even joe because joe and cory are bestfriends too ...idnt know wht to do...cuz cory in two of my cles and were good friends too but i guess ill just have to ignore him cuz my friend rachel might get mad that i talk to him more and i was thinking that ima just tell rachell that im over him but really not ..and then when cory wants to talk tome ill just be ctrn and ignore him and get away from my friends at lunch ...what should i do? i need help.....what should i do with cory and rachel..