Probably the single strongest indicator of one's love for anything is by one's expression. Look at the people around you, look at yourself:
Jesus said: "You will recognize them by their fruits. Are grapes gathered from thorn bushes, or figs from thistles?"
It is my lament for this age that so few church goers most want to talk about life with Jesus. It is often not even the second, or third topic or preference. I have sometimes found non-believers more keen than Christians to engage in discussion.
A leading thinker of the western world recently suggested that it is because we have no confidence in what we say, and we have no confidence because we have no passion.
Image credit: http://www.sxc.hu/photo/1382919