Depends on whether you had any other c. moschatas in the area to cross pollinate. Even if you grew a hybrid, and did not have cross pollination it would still be a butternut just not an exact copy.

Can zucchini cross pollinate with it? thats the only other kind of squash i grew last summer. Unless cucumbers count?

Butternut Squash does not cross with zucchini or cucumbers. You should get butternuts.

No: has to be a C.moschata which includes some pumpkins like Dickerson, and winter squash like Black Futsu, Rumbo, Fairy Tale, Muang, Beung Carn, Cheese etc.

Unless your neighbor is growing any, but they are all pretty niche varieties of squash.

I grow butternuts every year, and we eat a lot. So my compost pile routinely features butternut seedlings, and I've transplanted some of them to my bed. That's exactly the situation you're in The fruit I get are pretty butternutty, though maybe shaped a bit different.