I'm not really sure about my sexuality, I feel like I might be bi, but I'm not really sexually attracted to anyone, I am attracted more by personality and looks I guess. How do I know?

I think that something good for you to try and do is remain very open; remain open in how you look at people, how you think you are attracted to people, and how you feel about yourself. If you try and put yourself into a box, especially if you feel as though you don't really identify with many (if any) of the listed feelings, you're going to feel pretty uncomfortable with yourself, and it'll maybe even lead to worse things. Make sure when you're exploring your sexuality that you're looking at all options; you may find yourself identifying as demisexual, or even asexual, or you may even feel as though you don't identify with anything out there, and that's fine too. :)