In a relationship there is always a lovor and a lovee. In real relationships this changes between the two involved.
Someone always does the chasing, the other one hangs off.
The one that chases, that always gives in is addicted to the love.
The one that hangs off is the one with the power. This power, in itself, is also addictive.
Does love or the addiction keep them together?
What happens when the one or both of things move away?
In the end, it is all about control. This control can be gained by smiles, or silence, or sometimes violence. Control is the mathematics of love. The mathematics helps determine who is the lovor and lovee. One is only part of the equation. Both together, the lovor and lovee, may make love.