You should also learn to keep quiet sometime about your progress in life, it's not everything you do you must tell people that you want to do or you are trying to achieve. When people get to know your plans, they may feel jealous and may do something that will stop you from reaching success. Some friends have killed eachother because they refused to keep somethings to their self, been a private person save you from a lot of things.
Yes, indeed a person who cannot keep his own secret cannot be kept by anyone else.
There are some things that you don't have to tell everyone, there are some secrets that you just have to keep to yourself, especially when you get older and you start earning, then your friendships, you have to think about everything you share so that nothing gets you into trouble later.
Suppose we are very rich and our friend needs money or our relatives and we make a strategy that where and how we should spend our money and how to make money from money at that time. If someone asks us for help, we will become a player if we help him, and if we do not help, we will be cut off from everyone and become bad in the eyes of everyone. That is, from the very beginning, our secrets should be kept to ourselves. How much we earn, where we earn, where we spend, all this should be limited to us.