A lot of people who use blogger are now stressing over whether GCF will go away for them too. But, chances are it most likely won't. You have to look at this from the perspective of Google, who is looking at this from the perspective of a company trying to get all its users onto its websites and platforms. The only reason that Google is taking away GCF for non-Blogger users is to encourage people to use Google +. They even say so in the official blog post about it:
Google Friend Connect—Friend Connect allows webmasters to add social features to their sites by embedding a few snippets of code. We're retiring the service for all non-Blogger sites on March 1, 2012. We encourage affected sites to create a Google+ page and place a Google+ badge on their site so they can bring their community of followers to Google+ and use new features like Circles and Hangouts to keep in touch.What reason would they possibly have to take it out of Blogger blogs? The answer: none. It would only harm them detrimentally, something they obviously don't want. There are tens of thousands of people using Blogger, most of whom use GCF and like it. If they were to take that away from their own product, they would be harming themselves. Bloggers would get irritated and most likely switch to another platform out of protest, and then where would Google be? They know that, so they won't do it. It's really a business decision more than anything.
I really think that they should keep GCF for everyone, because there are a lot of bloggers that I follow using it that aren't Blogger bloggers (haha, that looks kinda funny) and it's just going to make it a bit more difficult to follow them since I don't use my feedreader very often. But, Google is trying to herd everyone into using Google +, so, they are unfortunately probably not going to go back on their decision.
So, if you're stressing, my advice is to not give it anymore thought. If you're a Blogspot blogger, don't worry about it. And if you're a blogger using another platform, then I'll gladly follow you via feed burner. :) It's that simple. And who knows? Maybe someone else will step up to the plate and make another type of follower widget, a better one, in the absence of GCF! Necessity is indeed the mother of invention.