Hmm, yes, good points. Let me elaborate on what was said to get the full sense of my meaning.
When I said not by my choice I meant that I have no control over the circumstances that would require me to marry. i.e., I cannot concoct circumstances to meet and marry a desirable mate. That is out of my control. If it were in my control, I would be married to her. Hence, my singleness, if I could do anything about it, is not my choice.
However, once we introduce the Christian world view, we realize that our lives are no longer our own. We give up our desires, or wants and needs to God and He (because He is sovereign) chooses for us today who will be married and who will not be (among other things). So in this sense, our singleness is a consequence of the choice we made to give up that desire to God.
In both circumstances, I do make the assumption that we are all sensible people that will not be so casual as to marry just anyone. It brings us to our third choice which I alluded to in the first circumstance. That there are requirements for marriage. We can choose to marry whomever is willing, but in most cases, that would be terribly unwise.
Hope I didn't loose anyone.