I haven't used icrush.org but I've used something similar.The way IT worked was someone went to the site to inform 'someone' that they had a crush on them.
That one person would recieve an email stating someone had a crush on them and to visit the site and type in the email address of ALL the people they had crushes on. Then all those people got the SAME email the someone got.
The only time you are confirmed that the person put YOUR name in, is if you put THEIR name in. Afterwhich both parties recieve an email stating they each have a crush on each other.
==========================================
So what I'm getting at, is you won't ever know who it is, unless you enter in their email address. And it's very possible your ex could have put your name in. Either because he wanted to see if you still liked him, OR because he recieved that SAME email and is curious if YOU put HIS name in.
==========================================
I realize this is all very confusing to read, but just think about it a bit and it'll all make sense.
------------------
jim
Beauty is in the eye of the Beer Holder
Brews and Cues