Deuterons have combined mass of a proton and a neutron. They have all field forces of positron. They are 3D objects with mass, matter field and inertia. They obey all inertial laws. They may be considered as self-sustaining matter bodies.
Deuterons attract each other due to gravity.
They repel each other due to their dominant north magnetic polarity. Depending on mutual orientation and distance between them, they may attract or repel each other due to their electric fields. Nuclear forces of deuterons being inward and attractive, two deuterons, if within range, will attract each other. Resultant of all these forces is that two deuterons in space will attract each other. When in close range this attractive force will be very strong.