How can you say that love is true?

I don't really know how to say that love is true...but I do have some ideas from a movie i have watched before.
These are some signs to know if it's already true love, based from the movie Got To Believe starring Claudine Barreto and Rico Yan:
1. there is a spark whenever the two of you see each other.
2. you feel uncomfortable having him/her around.
3. you always think something's wrong with you whenever he or she is near

It can never be clearly explained...how someone get to feel true love. But as for me, there is no such thing as true love, it is a matter of knowing and dedicating ones self to someone important.