I am going to be brief, as I am pretty much over this conversation-- but here is how to figure out if the people you are following on are actually following you back on Twitter.
Go to you twitter homepage and click on the "Following" link. This will bring up a list of all the people you are following on Twitter. (Sidenote: Also click on the "Followers" tab to make sure you are following all the people that are following you, that you also want to follow back, as I found there were a lot of people I had no idea I was not following or were even following me.)
Okay, back on topic, so you can figure out who is following you back because if there is a "message | nudge" option next to their name then they are following you back.
If that option is not there, then they are not following you back because you cannot contact them directly.
I would give them a chance, de-follow, then re-follow and if they still don't follow you back, say c-yah. Unless of course you want their updates whether or not they actually follow you back.
