No one is entitled to your time and energy. The fact that they consider you a close friend does not override how you feel about them. You are party in this too, and your perspective matters just as much. Do not let them bully you into being their friend if you don't really want to be.

And even if you do want to be their friend, set some healthy boundaries. Talk to them and tell them how you feel, gently. If they react poorly and think you're an asshole for it, they weren't really your friend anyway - you were just their emotional punching bag. Maybe they will learn something from it. People grow and mature by learning from mistakes.

So what if they live next to you? The occasional awkward pass in the hallway is not as bad as getting your energy drained for several hours a week. They'll get over it.

Do not let people steamroll you like this. This is how you get into one-sided relationships. Please, please, please, value your time and mental energy more than that. You deserve it. Anyone deserves it.