I miss my best friend. dont know what to do?

So, me and this girl Kaitlyn were like absolute best friends. We did everything together, and were pretty much like sisters. Well, a situation came up with her mom, and all the sudden everything goes down hill. We start to fight about every little thing , and we get jealous, and so mad at each other. So a couple months ago, she moved to another school, and starts to completely ignore me. I told myself that I didn't care, I didn't need her or anything. I'm not exactly 'the popular girl', but I do have plenty of friends. Most of them are guys. Recently, my best friend is a guy, and I love him. Like seriously. And he loves me back. So yea... but I'm just missing my old best friend who's a girl, and I don't know what to do about it. Ive sent her messages on Facebook, but she hasn't messaged me back at all. The last time I talked to her, we were in an argument. I guess we worked it out.. but we haven't talked. Now that its summer, I'm going to miss her more. So I don't know what to do. Any advice?