Strangers send messages saying they like me.

You are a boy, so there is nothing to hesitate about. It's no problem to have more friends in this society now, but we should plan ahead. If you don't have a girlfriend, you can try to meet her. If you think she won't talk to you just to cheat you, you can try dating her. After all, it is still difficult to meet someone who likes you, and the days when you can be with someone who likes you are still relatively happy.