Silent message

there is always a message in silence, you need to understand it, if some start ignoring you not replying you, not giving answers to your questions?? Then there can two situations only one may be that person is going through something which he/she don't want to share, then you need to silently support them even if they don't want it. 

Secondly may be that person now doesn't want to be you in their life so they are cutting off themselves from you, move one and don't put any sort of effort for that person coz they don't deserve it. So you need to figure out this what she / he going through and make your decision wisely.