Is what happened under the influence of hashish an inspiration from Allah that necessitates marrying a specific girl?

It cannot be definitively stated that what happened was an inspiration from Allah, especially since it occurred under the influence of hashish. Rather, it is closer to an inspiration from Satan and a delusion. Nothing can be built upon this, and you are not obligated to marry the girl. You must repent to Allah for consuming the forbidden hashish. If the girl is righteous and it is possible to marry her, then that is a good thing.