Puppy love refers to the relationship between underage men and women or their interest in the same sex or the opposite sex, infatuation or unrequited love, which is generally dominated by primary and secondary school students. The word "puppy love" has the negative emotional color of elders, and it is only widely used in China all over the world.
Moreover, at a certain stage in the university, many students have reached the legal age of marriage, so it is more natural to fall in love in the university.
So falling in love in college is not puppy love. Many times, teachers, classmates, parents and so on have recognized the existence of love.