I'm recently divorced man. We terminated the marriage and cancelled our legal duties. I feel so free now!. 
Sorry to hear that, but glad you're feeling good about it.
Yeah, for sure. Divorce laws are different all over the world, but where I am we needed to go to court and through the legal process. But it was totally worth it. 
Was it very costly?
Well yeah, a bit. The lawyer was a lot also. An annulment would probably have been much easier, just declaring our marriage null and void. 
How long before you can annul? I think there's a limit right?
Hmm, I'm not exactly sure. Although when you get one they consider it retroactive. Meaning an annulment makes the whole marriage be considered invalid from the beginning.