I miss my best friend, how do i get her back?

Me and my bestfriend got in a huge fight on Friday. I admit that i probably overreacted on something little. She has this friend that she's been good friends with since 4th grade and i don't like her at all. She's been rude to me on numerous occasions. Last september is when me and my bestfriend got really close. Something happened between her and this other girl and they didnt really talk much last year. This year they started talking again and i guess became close again and out of jealousy i was like if your best friends with her then you dont want to be friends with me. She happened to be with the girl and this started a huge fighting match and long story short she said we needed a break :( today we were taking a final and it was really awk. I asked her if she's still mad and she said a little but like we use to bbm 24/7 and we haven't bbmed since the fight. I know what i did was wrong and i shouldn't have made her choose and i'm really sorry about that i just didnt want her to become close with the other girl and forget about me. Before i asked her not to be friends with her and she ended the friendship for me but now she's doing the oposite. Idk what to do i just want everything to go back to normal and my bestfriend back.