When you are single, you do not make plans for anyone but you. Your time is your own. You could decide to go out, and then change your mind almost immediately, and no one will be mad at you for it.There is also no one crashing into an already arranged schedule and making you change your entire plans.
You also do not have to make time for anything that is not exactly beneficial to you. You don’t have to share your time with someone and explain why you need some time off.