Im adding a standard door from starter content into a doorframe from same. I want it to open when i come in contact with it physically opening when i push it and go back to being closed when im not touching it anymore.
When i try to add a physical constraint as a hinge using the frame as point 1 and the door as point two. When I only add 1 it dangles off the hinge through the frame and floor, if I add another hinge i cant move the door at all…
Help please? 
Seems like you enable physics simulation. Having one hinge and dangling is realistic.
check:
If you have a first person pawn you may not have any mass 
Instead of hinges, add a rotational constraint to it.
Attach something called a PhysicsConstraintComponent
Input the name of the actor of the door into Constraint Component 1
Lock/Free the axes until you get the result you want. For example, if you free X,Y and lock Z the actor can not move up and down. If you constrain them all it can not move in any direction, only rotate(I believe).
Hope this helps.