Serious (call it platonic or enlightened) love can be very dangerous, especially for an introverted person. It is almost impossible or at least extremely difficult to express their love. If their crush rejects them even slightly, then it hurts devastatingly. That may change them forever. They will never be the same person as they used to be.
The feelings during this platonic or first love remain pure and unprecedented, and relations with others can never give those same feelings, which will ultimately become the great nostalgia of our life.
There may be many great films about love, but this list has tried to include only those films in which generally introverted protagonists can't express love for their crush; they can't even speak with them and that's why they have minimal to almost no dialogue. These types of films are so intriguing, especially for those who have seriously fallen in love but couldn't express their feelings, and they are still in a deep obsession about their crush.
