Is Extreme Love A Disease??

Love and obsession share the same neuro-chemical properties. studies have shown that people with low serotonin levels in their brain, are more prone to fall in a love and normal healthy people who fall in love, show a decrease in their brain serotonin level.
It is proven that many people lose the ability to love by getting such medication to the point that this becomes an unwanted side effect of such antidepressants that threatens the relationship of couples that were in love but suffered from some kind of depression or anxiety.
Although initially it seems a bad idea to make people love-incapable, and specially considering the current world condition that seems to need love more than ever, it may be a good idea to use it for special love cases that are extreme and disables one's ability to live a normal life to me, love is the most beautiful and the most vital concept in life. That is why the extra ordinary pieces in literature are on love, like Romeo and Juliet; Lancelot and Guinevere , etc. I admire these lovers but doubt that such great love is considered healthy in today's world and shall it be considered a mental disease ?
Such great love is an ocean of emotion and once it turns to a tragedy will soon be the lover's number one enemy. it will directly and indirectly affect the quality of life to the point that one is not willing to pursue normal life and reject all other kinds of pleasure, blinding oneself to anything but the great love of one's unique beloved. Is it okay to be such unconditional ultimate lover or it is better to manage the feelings by serotonin altering medication since logic is no good in the land of love.......