Best friend and ex boyfriend. hellppp!!!, I really dont like this. Options

[Heartourbeat]

Well I have a best friend,jordan, who I've pretty much clicked with since the beginning of the school year. She's been like a sister to me. Well, at the beginning of 2nd semester, I met this boy, Anthony, who sat next to me in math class, and in front of Jordan. After like a few weeks me and Anthony started going out, and it was like we had this group of best friends. Anthnny because me better friends with jordan, but you really couldnt call them best friends I guess. Well decided to break up with Anthony, because he was like barely talking to me, but talking to Jordan more than me. I would talk to him on IM and he would be talking to Jordan. Things were just like equal. Being his gf gave me no special attention from him. I was just another one of his friends. Well now that we broke up, him and Jordan and still calling themselves "best friends" and talking. I know its wrong but it annoys me. I feel like they will start going out or something.(even though she swears she doesnt like him..I believe her though) THe day I broke up with him, she moved from like number 12 on his top to number ONE. I was so pissed. Idk if im over reacting but I really cant stand my best friend being buddy buddy with my ex. I dont like it at all. :[

what do i do?
Jordan says I'm jealous of everyone he talks to, and I'm not.