I suppose it depends on how you define being "spiritual" To me it means looking beyond the here and now and beyond the obvious physical clues we have so far and listening to your own inner knowings or for other parts of your consciousness that might be somewhat drowned out by the daily noise of ones life. I think I've always been kinda' spiritual, at least I was willing to look into it, but I was made to feel like I was doing it wrong...was deficient somehow. Now that I'm doing things or looking into things because they speak to me for some reason, it comes much more easily and with greater satisfaction.
I don't know if there is a God or not...how can that even be proven without a shadow of a doubt ? Maybe it's none of our business and thats why he,(if he exists) didn't make things more obvious to us. I've gotten comfortable with not knowing. I've taken on a more "wait and see" attitude. I am not responsible for having the answers to all the big picture questions, sharing my answers with others and judging them if they don't act on what I've told them.