They have solid, deep relationships, and aren't concerned with accumulating acquaintances
Whether you’re an introvert or an extrovert, humans are all social beings who need connection to thrive. This means real, live friendships, where you actually hear each other’s voice (and even spend time together in person!). Happy people's friendships and romantic relationships are based on connection, not money or status.
This doesn't mean you have to come from a supportive family you love unconditionally in order to be happy! It just means you should seek out relationships in which you feel safe, respected, and accepted, in spite of your imperfections. If your family provides that, great; if not, seek it elsewhere.
They actually derive meaning from their day-to-day lives
Happy people don't live for the weekend. I mean, they like the weekend and all. They're down for sleeping in and having no set obligations, but they don't start dreading Monday come Sunday morning.
One of my clients, "Greg," was your prototypical “finance guy.” Bottle service every Saturday, eyeing a Maserati as his next purchase, taking a different beautiful woman to a different destination once a month. Yet amidst all the glamour and things, Greg was depressed. Largely contributing to his unhappiness? The lack of purpose he felt. Greg realized that depression was telling him he yearned for fulfillment. He remembered coaching and playing rugby in college, which was also the last time he remembered feeling happy. Instead of buying the Maserati, Greg co-founded a coaching academy with an old teammate. Three years later, he doesn’t have the money to spend on bottle service every Saturday night, but he sure as hell doesn’t miss it.