How can i become this girls friend?

Last August I met this girl named paula. This was before she was all cool. The very first dayy we met we had a sleepover and it was awsome. The next couple of days we were having th most fun ive ever had! Then one night me and my other friend got into a stupid fist fight. So me and paula kinda stopped hanging out. Some how we ended up hateing eachother but anyways fast-forword to like march my friend brought me to the skatepark and she was there we were cool then so we all hung out me and a bunch of ppl and we had funnwe were laughing about old things she even showed me where i left my shoe months ago outside. Talked to her a couple of times in school/im/myspace. Then we ended up hanging out agan it wasnt planned but we had fun with like 20 guys at the skate park. She would say heyy to me in the hall and like high-5 me witch was awsome! But shes just nice to everybody I asked her if she wanted to have a sleppover like old times and she said yah but she always says yah to be nice....