I think a romantic crush can be similar to the buzz we used to get from alcohol, and can be used to try and fill the same kind of inner void, so I think it is connected yeah.
I used to crush a lot in my twenties. I don't think it needs to always be that way tho.
Maybe it's age, or maybe it's because recovery is about healing the void we used to try to fill with 'stuff', but the crush problem is history to me now
D