Why don’t people stick around in life?

I think it takes two to make a string connection and keep it connected. I get you. It's sad when it happens, honestly, this drifting apart thing between friends and family and lovers. Sometimes you end up fighting with someone and years later you reconnect after you've overgrown your bitterness and hatred and just miss each other. Sometimes you feel so close to a person only to feel left out because he/she's there and wants to hang out when he/she's sad but when he/she's happy, you're not the one he/she's with. It depends on the kind of people you surround yourself with. But what I've learned is that not everything's black and white. They can fail you. But it's worth giving them another shot. If it still doesn't end up well after many tries, then you leave. But as for the people you see you want to keep, just pray for a heart that can forgive. Because we're humans and honest to goodness, we always hurt other humans, whether we mean it or not.