Getting attached to people is literally the biggest mistake you can ever make.  Even when it's great, I can guarantee that at some point you will regret it.  You give them the power to hurt you and they will, without fail in most cases.  But you're so fucked though because if you don't get close to anyone, you're lonely and it hurts so badly.  There's a physical pain you will feel.  It's unpleasant and you're damned if you do and damned if you don't.