That’s our difference. I prefer my alone time with him. He prefers it with himself .
Girl - this is an introvert/extrovert thing. Extroverts recharge by being with people (you). Introverts recharge by being alone (him). It's not a wrong or right, it's just important to understand what you're dealing with.
Not all introverts are shy - some of us can be very sociable, but we still need some alone time to recharge. Let him have his alone time on Sundays and plan fun time with your girlfriends on Sunday nights. That way you'll both be getting your needs met.
