Nighttime parenting really is hard.
When Ellie was a little over 2, we made a huge deal about her new room and she helped us pick out bedding and paint. We bought her a full size bed and she couldn't wait to sleep on it. We specifically picked out a bed big enough for one of us to sleep with her.
She still needed that reassurance from us at night for a while though.One of us spent part of the night with her in her bed for a while, but we were able to get a few hours by ourselves in between her going to sleep and needing us again.
Shortly after Ellie turned 2, she started developing a lot of nighttime fears - shadows, monsters, things under the bed, etc. She was genuinely afraid. At 3.5, she spends most nights completely by herself.