Popa’s right. I apologize to the OP for my tone.
I think you’ve gotten some good advice, though, to follow up on your own. Sometimes shadchanim need a reminder to keep you or your child in mind.
It probably is difficult for a shadchan to call to say they haven’t been successful in finding a prospective shidduch, but it might be helpful to call occasionally to ask if there are any updates. The very fact that he/she might feel bad to have to answer in the negative, might just give that little extra push to focus on finding someone.
Hatzlocha, may you soon be zoche to celebrate a simcha, and once again, please accept my apology for my insensitivity (and thanks, popa, for the musser).