People are always busy, they have their own problems that need to be solved, some don't have enough time, some are selfish, some don't know how to deal with other peoples problems... It's always best to stay far away from those kind of people, they will ask for your help, but when you need their help, you will just have their backs pointed at you.
They are selfish at heart. There is nothing that can be done about them.
Just forget about those kind of people and live as if they didn't even existed... Be a selfish person too.