Losing contact with high school classmates is inevitable, but it is also temporary. Because we haven't entered the society yet, there are few common topics. When they enter the society and get through the adaptation period, you may become bosom friends again, if it is fate. Or more directly, if it is mutually beneficial.

You are always obsessed with college, which is a knot in your heart.

There are many ways to enroll in classes and teach yourself. But it seems that adult education is not full-time. Is it the same as the university in your mind? It seems that adult education should focus not only on science, but also on liberal arts. Not really. You can consult a professional.

You seem to be at odds with your parents' values, and communication seems to be insufficient. Your parents are pragmatists, and you seem to have some romantic temperament and pursue ideals. But obviously you are not as strong as your parents, so the college entrance examination didn't come according to your own wishes.

To sum up, I think you should first make sure what you really think. If you really want to study, you should communicate with your parents.