Listen, man. This forum is for people to TRY and give advice on hair loss. If you go bald, IT IS NOT the end of the world. I'm 17 and I've shaved my head 3 times now, just to see how it would feel (2 times before the quarantine) and honestly, I found out that it is not that bad. I even got my first GF during my time as a clean shaven dude at SIXTEEN.
Now, you have to get off finasteride. You must also understand that nocebo is a real thing (opposite of placebo), and it has been shown that out of 1.7 % of people who thought they got side effects, 1.2% were experiencing a nocebo effect (look it up).
Stay off finasteride for at least 3 months. Try and forget about the side effects and you'll see definite improvements. Then, if you want to restart the treatment, try with a lower dose (1mg 3 times a week instead of a daily dose).
Or you can always forget about everything, get off finasteride and move on with your life! I talked to girls about my hair loss and they honestly didn't care. It's your choice.
Good luck man! Calm down, and tbh, if a girl cares only about your f*****g hair, then she's immature and dumb.
EDIT: Please write back and share your thoughts, I wouldn't want to see someone kill themselves because of hair. I understand your pain and fear of losing your hair very well.