For many people day six lands on a weekend, or at least an evening with nothing planned. Busy days were a distraction. Free time is where the relationship used to live, so this is when it feels most empty.
Saturday plans, Sunday mornings, the takeaway you always ordered together: those gaps are hard to ignore. If you feel worse today than you did midweek, the empty calendar is probably part of it.
Plan the empty hours
You don't need a packed schedule. One or two fixed points in the day help a lot. Meet a friend for lunch, go to the gym at a set time, take a long walk somewhere you didn't go with them. Having somewhere to be breaks up the hours when you'd otherwise sit and scroll.
It can help to tell people what you're doing. Something like "I'm having a rough week, can we hang out Saturday?" is a completely normal thing to send. Most friends are glad to be asked.
Be careful with nights out
Going out can be good for you. It can also mean a late-night message after a few drinks. If you're going out, decide beforehand what you'll do if the urge hits. Some people give their phone to a friend for an hour. Others mute the chat and leave it at that. Choose something you'll actually stick to.
Spend a little time alone on purpose
Being alone isn't the enemy. Try a short stretch of time on your own that you choose, like cooking a proper meal or watching something you like. It's practice for a life where your free time belongs to you again.
Sunday evenings
If tomorrow is a work or school day, Sunday evening can bring its own kind of low. Getting your things ready for the week, putting on something familiar and going to bed at a sensible time all help. It's an easy evening to feel sorry for yourself, so keep it simple and kind.
Tomorrow is a week
You're one day away from a full week. Whatever happens tonight, write the urges down rather than sending them. Tomorrow you'll be glad you did.