So ilike this girl. I have known her since 3rd grade we used to date. We dated for about 9 months and then broke up now I like her agean and I don't know if she likes me what so ever what do I do??

You like her, but you don't LOVE her, you broke up in the past, and you're not even sure if she even LIKES you... I would try to move forward before you set yourself up for another break-up with this girl... IF she's even interested.