Have faith in Hashem. When your true shidduch comes, it should be clear to you and that other. But of course, it is not a surprise that we may indeed find a number of dates in our life and not meet our besheret until it is G-ds chosen time. Does this surprise you? Do you really think at 20 year old really knows ones own neshama so well that he or she is always ready to go to the chuppah? Truly this was the factor in days gone by that one might marry in a youthful time, but today, that is really not so anymore. Of course many of you merit being tied so well to the religious jewish communities that there will be a good number of visits from potential shidduchs in your time.
I am not yet wedded and at my growing years, I do not fret over all. I believe what is in G-ds interests will happen. I also happen to have known some fantastic souls who did not marry in their lifetime. Perhaps G-d has his methods and reasons.