It’s okay to like someone but what is not okay is to do something about it even though you’re not ready to get married.
“Islam wants to be pure to your spouse so you can really enjoy your spouse, so you can be with them with your heart and soul.”
–Nouman Ali Khan
You don’t want to have your mind lingering for someone else, you don’t want to be scarred because of past relationships. You do not want to be incomplete when you marry someone.
So safeguard yourselves.