Here is a poem depicting the many theories and views surrounding the question:
Are emotions invalid evidence and examples if used to support one's beliefs in passion and love? Can you pick out the different theories and ideas? If not, they are outlined below the poem.

Love must be what I am used to seeing,
What I am used to reading about in magazines.
Passion must be secretive and forbidden,
Not sensuous and enveloping.
I reason with myself that this is how it must be,
Yet I find this generalization invalid.
My emotions do not feel the way they should.

This love appeals strictly to my heart,
The burning orb that clouds my eyes.
How do I know what is real,
And what I have created as an illusion?
I could trust my eyes, my heart, my mind.
But what if they prove me wrong?
How do I know the truth?

Society tells me to feel one way,
But it seems like it's all so blind.
Perhaps love in general is similar,
But who defines true passion?
How do they know that they've even felt it?
They may think that they know what passion is,
But I doubt that they could meet/understand my own.

 * Emotions used to support one's beliefs and opinions become invalid as evidence when they are created using inductive reasoning.
* Inductive reasoning is when you make a generalization (I.e. "everyone breaks up after high school is over.") Saying so is to make a generalization that all humans experience the same events and have the same perspectives, and that the definition of the love and importance is universal, which is untrue. ("Philosophy Questions and Theories" 73-75)
* If one believes that they must experience love and passion in a similar way as everyone else, and convinces themselves that they can base their actions purely on emotion, then the emotions in question are invalid as evidence.

 * If love is indeed a fallacy, and appeals strictly to emotion (in the form of inductive reasoning), then can love or passion truly be real? (Ibid.,76-77) How do we know what is real? We tend to rely on our senses, but what happens when our senses fail us? How can we truly experience passion if we are not even guaranteed that our senses are providing us with the true reality? (Ibid.,114-117)

 * There is also the common use of inductive reasoning when society discusses love. There is the assumption that sexual passion is the same for everyone, which may be false. If you assume that each individual has separate influences which help to define who they are, then each individual will experience sexual passion differently. If there are certain pre-programmed values and habits in us as a species (by what/who is open for discussion), then perhaps the general experience is the same. However, there are different perspectives on the same experience.