So you both have a day off together, the first on in forever…does he want to spend it curled up watching films with you or going out to see his mates? Probably to see his mates, if you live together there is no harm in him going out for a day since you’ll see him that night and every one after that. Just be calm about it, it doesn’t mean he doesn’t want to be with you, it just means he has friends too. Don’t take it to heart, you’re still his girl. We all need a break from those we love sometimes. Take the opportunity to have some well-deserved ‘me time’ and turn it into a positive.