How am i suppose to get back with my girlfriend?

We are both 14 and we were dating for about 9months. Then we began to argue and she said she wants space. In other words 'Breaking up' But she explained to me that it was only for a short period of time and she'd get back together with me. A month went past and i began to ask are you going to get back together with me. Everytime i brang the subject up she got pissed off at me. Eventually after a while when i said it she answered:Maybe one day. I was like WTF in my head because she had completly changed what she said. So after all of that she often teased me on facebook by saying stuff like ";) And xoxo ect." But the next day after all of her teasing if i said to her i love her she would just say 'okay'. Is she purposefully playing with my brain >.< I am completly love sick and want her back what am i suppose to do. I've asked her a few times to come back into my life and shes just said maybe on day. Help? No rude answers please -.-