Definitely get it. There are like 4 endings not 36 and I have seen them all. Also by "endings" it means who you end up with, who you're still friends with, not the actual ending as in how the story ties up.
I got the happy ending when I played through it, ill give you two pieces of advice though, support the white haired girl you call your daughter. Treat her as if she is your real life daughter who needs time and don't sell her out.
The black haired girl you thought you loved isn't the one, chase the girl with the red hair until the end.