Can someone please tell me the difference between ommi and bi?

So I'm non-binary and sense last year I've identified as bi and I always thought about it like bisexual means your attracted to male female and other genders but with a preference and pansexual means you don't have a preference but now I'm confused with learning about omnisexual I do have a preference towards the male sex rather than the female and gender doesn't matter to me so am I still bi or am I ommi?

Sorry if I'm not explaining this well I've just never questioned my sexuality until last year so this is still new to me