How do I find out if I’m bi or les?

So I say I’m bi, but I’m not sure if I like people of the opposite gender. For the same gender yes I am 100% sure but for opposite gender I’m having trouble, i do imagine myself doing things to the same sex but when I imagine the opposite gender I get disgusted. How do I find out I like people of the opposite gender? This has always been an issue
How do I find out if I’m bi or les?
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