Can you please help me?

I waited a couple months,And dumped Ryan.I decided that I wanted to be friends with Katie(See Katie's and my bff thing) agian. I called her and told her that I wanted to be friends agian.She said she'd think,and then a week later said yes.Now,Sometimes I can't stand being around Katie and at the same time hate being away from her.I feel the need to throw a mini dance party and be bff's forever and at the sametime want to smack her.Then I feel the need to ignore her and also go somewhere with her.And now I think I made the wrong choice but at the same time the right one.I feel like getting back with Ryan and being BFF's with Katie.Then I feel the need to never see them agian.Can you please help me? And also,I feel happy when I'm sad and sad when I'm happy.