I agree with Be Happy, find something to give you sipuk (with a Kooff), which is fulfillment or satisfaction. Find a job or volunteer at something that makes you feel accomplished.
If your teachers taught you that everything you’re studying is to get you into a better seminary or to get a better shidduch, please file that away in an old thread the CR had about erroneous information teachers pass on to their unsuspecting students, and then forget about it! It would seem from what Shlomo Hamelech wrote in Kohelet, that he was not satisfied with pursuing scientific knowledge just for the sake of knowledge, and found it futile and useless. The only productive thing we can do, he concludes, is put our efforts into fear of H-m, and keeping the Mitzvot.
Don’t worry about what seminary you get into. Find something to do that will keep you happy, and hopefully build you as a person. And that’s a good way to set yourself up for shidduchim too!