Well all of us feel so many things and then think should we speak it or not. Imagine someone hurt you, LOL there is nothing to imagine there is always someone to hurt you and then you just can't decide what should you do. Think now how it feels. Doesn't it kill you from inside?

Possible ways which keep us silent:

1. We don't want to hurt that person - This is the stupidest thing to do seriously. You have all the right to say what you felt. You felt bad and according to karma you have all the right to make them feel bad too. May be that person will understand you too and is never going to make that mistake again.
2. We want to act mature - This is something I can't say why people do i mean expressing your feelings is not being immature. In fact the one who knows how to express their feelings shows the sign of maturity.
3. We don't wanna make fool of ourselves- If you think expressing is going to make you feel embarrassed then trust me its not your problem. Its the problem of people who are around you. Tell me if they can't value your emotions do they really deserve you. A big NO. You are better of alone.
4. Fear that they are not going to understand- Well this is something so true. At times people actually don't understand what we are trying to say and so we decide it's better to shut up. But I think it's not an option. Tell them what you feel right now and may be after sometime they will realize what you said. Even if they don't it's okay at least you said what you wanted to say.

There can still be many more reasons as it depends on the situation. But in any case confrontation is the best thing you can do. If you don't think that they deserve even talking to you and you wanna leave their life silently well and good but after sometime you will realize that you should have said what you wanted to say.

Concealing everything in yourself will only build a huge volcano of feelings that can erupt anytime. Even when you don't  want to. This can only kill you from inside. So say what you want to say to that person or the person whom you trust. Let me tell you a secret "NOBODY CARES" okay! so say what you want to, it may effect someone for sometime but after that they are going to get busy in their own world. So speak out. You have all the right in this world to do so. Your mental health needs attention too. 

THANKYOU