Just give it time.
Don’t ask me why they come back. Maybe you’re the rebound. Maybe they finally realized what they lost.
Watch the sunrise and/or sunset together.
Always assume the best in people. No matter what happens, assume that they weren’t doing anything out of malus or spite but instead just doing what they thought was best at the moment.
People will more times than not walk into a relationship with all the best intentions but inevitably end up hurting their partners not because they mean to but because they really can’t help it.