You can't unblock yourself from somebody else's profile unless you have accessibility to that account on your own.
How Can You Unblock Yourself From Someones Facebook
However, there are a couple of points that may make you feel much better:
: > You can still view whatever they publish publicly (as long as you aren't watching it as/from the obstructed account). You just won't see what they post to friends.
: > You can still watch their public account by seeing it's unique URL (www.facebook.com/firstname.lastname, normally).
: > You can make a new profile as well as with any luck add the person who obstructed you to this brand-new account (making believe to be another person). Nonetheless, I view this as a last option and do not suggest it since it can backfire and also make points even worse than originally. This protests Facebook's TOS, additionally.
: > If you know their Facebook email address, you can compose them an e-mail from a regular email account and also it may most likely to their Facebook inbox (I believe this still functions).
: > There are other methods to call the individual (text, e-mail, smoke signals/pigeons, and so on).
Other than those things, you can ask to unclog you. If they don't, feel far better recognizing the person that blocked you does not care anymore (if they seemingly never cared, really feel also much better).
Don't seem like you can't get a message to this person, because you can if you truly intend to.