The one who loves less is in control of the relationship

[Aliantha]

I think it's true that in relationships where one loves more than the other there is definitely a power/control benefit to the one who loves less.

I don't think the one who loves less is necessarily a bad person though and probably not at fault too much unless they consciously take advantage of the situation.

The fault is probably more with the one who loves more, if you could call it a fault. To me it just comes down to the person not believing they deserve more or could even find more and as we all know, this is a self esteem issue and is totally unrelated to the actual relationship (unless of course the self esteem issue was caused by the relationship which is unlikely because it probably wouldn't have happened if the self esteem was high in the first place).