I miss my old friends :/ (kinda long)?

So im a sopre in high school. Our schools are different like we have a k-3 school, 4-6 school, 7-9 school, and 10-12. From 7th to 9th grade i because REALLY close with three other girls, but one was my a solute best friend and we did evrything together. Last year we had a ton of drama though with one girl, so our friendships started to fade with that one girl. But over this past summer the girl that started all the drama apologized and we all became close again. But then my best friend and her would always ditch us, and the beginning of this school year my (old) best friend went after my ex that i was with for practically 9 mos off and on. So our friendship ended, the girl with the drama likes to party now and is a pothead, and the other girl is actually who i miss, we hung out all summer. I just messaged her on facebook and told her we need to han sometime aince we havent since the beginning of the school year. Any tips on how to not make it awkward since we havent hung in such a long time? And also i dont really like the new friends ive made as much.