I expressed some of my thoughts on how to know if one's therapy is working in this article Therapy Consumer Guide - How Do I Know If My Therapy Is Working? but it may not describe your specific situation.

In your case, the first step, I think, is to talk about your concerns with your therapist, as was suggested in the previous post. If she seems to understand, give her a chance to change the way she works to fit your needs. If during the next session you feel that she is not "getting" it, I wouldn't give her any more chances. People either "get it" or they don't and you can see it immediately. So, if you see no noticeable changes after you talk to her, then it's going to be clear to you that it's not working. What you do with this knowledge is up to you.

But, personally, if a therapist said to me "you'll meet someone", that'd be enough for me to leave and find someone else. "You'll meet someone" sounds more like a bad advice from a friend, a kind of advice that friends give each other all the time, not something a professional would or should ever say. Frankly, I wouldn't appreciate this statement even from a friend, let alone a therapist. It is dismissive, minimizing and invalidating of your current emotional struggle IMO. It basically implies that your present emotions should not be taken seriously because "everything will be okay" in the end (which no one knows if it's going to be the case, as you correctly pointed out). In my training as a therapist I was specifically taught not to make stupid and insensitive statements like that. So any professional who makes them is unqualified to do their job by my standards. Or they just need more training.