It means you notice girls all the time. Especially curves and pretty faces. It feels weird to imagine kissing and stuff and don't feel anything towards guys.

I think it's less important to assign meaning or labels to any of it and more important to work through who you really are. If you find someone attractive and interesting, regardless of gender, you should consider dating them. Have fun together and whatever comes of it, kissing or whatever, then that's where it goes.