why excitement and happiness? why?

as my heart pounds from excitement
i don't understand why.
sure i am happy that i am talking to you
but how is talking to you any different from talking to the other guys i have liked
i cant make a decision on why
is it because i missed you?
is it because you have been gone and i have been waiting?
or is it because i really like you more than anyone else i have ever liked?
either way it comes to me being excited.
all i know is that when i talk to you
everything else seems to disappear,
nothing in the world matters,
its just you and me talking as if we have known each-other for years,
we joke, laugh, tell each-other the complications in our life, and we talk about us.
when we talk about us, it is hard to focus cause i am so happy and different things rush through my mind with every word you put in my head, but i am still happy and excited.
why?
i don't know the answer to yet, all i can say is that there is a reason, and it needs to be discovered, for why i am like this... but only with you