A question relating to relationships, i really need help can you guys answer this?

There is a girl i have known for about 5 years now. She ask's that I should go to her house nearly everyday of the week, yet just 3 months ago she said to me "I don't want people seeing us talking, they may get the wrong idea"! Prior to this behavior, i used to go to her house every week and we would roll around in her blankets or we would snuggle in her bed.... but she still has not kissed me, but now that im paying virtually no attention to her she starts clinging to me! She treats me like im no one in real life around others, but on the internet she act's all buddy buddy! She's a pretty popular girl too.... so im certain she's not shy towards me.Then i go out with another girl and she asks me to be in a relationship with her! I couldnt tell if she was joking or not but i have not really answered her yet.....I'm curious to see people's opinions on her and im also curious to see if people think she's had some sort of long term crush on me