Boy/Men problems!! Please help!!?

So I met this guy on a matrimonial site. We had tons of chemistry online and over the phone. He said he really liked me, etc. and then all of a sudden it's like things just changed. Based on our last conversation, he really liked me and told me that he'd call me soon. It's been over 2 weeks now and have not seen him online since and nor has he returned any of my texts or phone calls (only called him twice and texted him once since then). At first I thought maybe something was wrong and that he might have had some personal problems going on but he's been on his myspace everyday since and has even logged into that site everyday. What could have went wrong? Should I approach him? Even though we never met face to face, I feel like I need closure of some sort. What could have went wrong?