LDS/Mormons: Have you ever asked to be released from a calling? If so, was it a hard decision to make?

I personally feel that you would not have the calling if you couldn't do it completely. Pray about it and hang in there. Just remember to pray as if everything depends on your Heavenly Father, but work as if everything depends on you. All will be easier for you if you go at it from that angle. I love my calling even though it's tough sometimes. It's worth every moment I dedicate to it!