Dating My Half Sisters' Cousin?

Anonymous
My older sisters are actually only my half sisters (we share the same father), and we've always been close ever since I was born. Recently, I met their cousin whilst on a trip with their mother. He and I are close in age, and instantly became friends. We've both come to realize that we are very romantically interested in each other. I could definitely see myself with him in the future, but am worried about how our families will see it. We aren't blood related, although both of our families have an unusual closeness despite my father divorcing my sisters' mother. Any options on the matter?
Dating My Half Sisters' Cousin?
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