What does it mean for boys to travel together?

There is no special significance for boys and girls to travel together. Maybe they want to see the outside world with this girl. If you are close friends, it is normal for boys to ask you to travel together. If you are just ordinary strangers, then traveling together should have special significance. Maybe I have a crush on you and want to tell you. Or he wants to further develop other relationships. If he has other bad intentions or ulterior motives, then you don't have to keep the appointment at all. If it's a kindness that can make you gain some life experience, then you can travel with him or experience it yourself.