why my heart feel pain?

4/11/2012
a brand new day for me as it is Sabbath.
didnt expect will see her in church because i thought she might go to another church.
quite happy and shock when i saw her sitting not far from me.
but, suddenly, a strange feeling flowing inside my heart.
i feel heart pain when i saw she is seating beside a guy.
what happened to me?
i kept asking myself what is this strange feeling?
jealous? irritating?
maybe...