Chemistry 101
The following will be an overview of basic organic and inorganic chemistry. Our intention is to provide the lay-reader with a basic understanding of chemistry and how it effects people in their daily lives. To that end, we will cover the reactions between, and the compositions of the elements responsible for so much of the magic that occurs in everyday life.
Let's start with a bit of chemistry everyone is familiar with: Infatuation.
Infatuation is a volatile reaction that tends to be short lived, but one that creates very tenuous bonds indeed. When both parties participate in the infatuative reaction, the bond is especially strong, occasionally leading to, and often mistaken for love but more often escalating until one or both parties observe flaws in their counterpart. In such cases the bond typically disintegrates in a spectacularly violent fashion. 
Sometimes, asymmetrical infatuative bonds may persist well beyond their usual one to three month lifespan. We refer to this type of bond as unrequited love. Unrequited love is a one-way attractive chemical bond between two parties, typically without the receiving party's awareness. It may persist for years and even decades. Laboratory tests have shown that in the majority of cases once the receiving party becomes aware of the bond, it quickly dissolves, leaving the two parties with mutually repelling polarized charges.Next we're going to take a look at lust. Lust is a form of bond that may or may not be independent of emotional bonds, such as love or infatuation. It is often hypothesized, however, that lust fields contains precursors to infatuation.
Scientists have not yet pinned down any concrete hypotheses to describe this process, though anecdotal evidence suggests it occurs more often in females than males. Additional anecdotal evidence also suggests that often males develop a counter-reaction to the females lust-triggered infatuation, with a compound known as lack of respect.
The fields of infatuation and lack of respect are uniquely charged, such that the party displaying lack of respect is repelled away from the party showing the infatuative charge, while conversely the infatuated party is positively charged towards the disrespecting party. This has not been positively explained by modern science.
Repulsion is a negative charge which is stronger than any of the previously described bonds. Researchers have hypothesized that repulsion contains precursors to lust, as it has been observed to appear spontaneously when two strongly repelling fields collide. Repulsion, along with lust are unique amongst the families of bonds described thus far insofar as they can be directed not only at organic, carbon-based life forms but also at inanimate objects and wholly intangible concepts.
Love is a strong, persistent, attractive bond between two parties. It has lately seen a decline, since the public's awareness and understanding of this particular bond has largely been informed (and perhaps undermined) by Disney films and romantic comedies, resulting in unrealistic expectations in the minds of their fans. Love bonds may or may not be paired with lust bonds. Amongst those who study these things, love is typified and distinguished from infatuation by virtue of the fact that infatuation makes the individual feel good in the presence of the target of their infatuation, while love makes the individual feel inspired to be a better person in the presence of the target of their feelings.