Before falling in love, a boy's heart may be aimless. Even when they know that they like someone, they may be cold, because they never thought they would be with him. I never thought that it would be possible between two people, and of course I never thought about what kind of responsibilities and obligations I need to bear. So I think before falling in love, boys may still be in a relatively naive state. They may still play games day and night, and they never fantasize that the person they like will be with them.
After a man falls in love, he also wants to really change himself and make himself a better and better person. Maybe I think the other person likes me, so I shouldn't let the person I like down. I will gradually get rid of my old bad habits. They will gradually learn to be tolerant and understanding, and even the best feelings may quarrel over some trivial matters. Perhaps in the past, when they encountered such a problem, they might be willful and unwilling to give others, but if the other person is the person they like, they are willing to put down their face for the other person because they have won something more important than face.
After a man falls in love, his mentality may also be that he has no goal before and loves life after. Because after falling in love, they may find that there are so many things they love in life and it is so beautiful when they get along with their girlfriends. So they will leave more beautiful memories between two people, and they will begin to plan their future slowly, because they don't want to be with each other in the future. So they will make themselves better and better people, and they will make themselves more and more capable because they want to decide what kind of life they will have in the future.