I'm afraid of heartbreak. I hate it!
Still....
I don't know why, but I still believe there is someone for everyone. Stubborn optimism, I guess

Well, I used to study biochemistry, and I remember we studied briefly about "love".
Apparently there's this molecule, that's released to your blood (after some body changes) and gives you that "feeling" of "love".

That made me intrigued, so I went to the library to read a little more about love from the scientific side. In a nutshell, from what I remember, that molecule is released when you (more specifically your brain) find an adequate potential person to procreate with. Later on another molecule joins which actually makes you stay with that person for a number of years, and unless cared for - disappears.

This 'scientific explanation' probably makes the whole thing seem very... dull, perhaps? Love's just a molecule that comes and goes (though not always). In fact, it is possible to create this molecule artificially. Some expensive chocolates have them. But still, in order for it to really work, more physiological changes are needed.

Now, I in no way say love does not exist, but don't lose your head over it - it's just a molecule.
If you do fall in love with someone, enjoy it. I know the last thing I'd be thinking about is how long is left 'till the molecule disappears ^^