Communication is "essential" in a healthy relationship. Sadly, when communication breaks down it leads to frustration, anger and then eventually "silence". We think, why even speak at all if they aren't even going to listen to me, we feel like we are being told we are wrong (even if we think we are right), or there's just no intimacy in our conversations (ie., we are just going through the motions)? Better to just be quiet and say nothing, right? WRONG!
By going "silent", you are allowing satan to get what he's been after all along. No communication. How can a relationship function without it? It can't. When all there is IS silence, the parties in the relationship fall further and further away, until one day, they don't know eachother any longer.
I bet you think I am talking about a marital relationship. Well, while I would say that ALL of this is true in a marriage, it is even MORE important in your relationship with Christ. Sometimes when we pray we may feel like we aren't being listened to, feel like we aren't getting what we want (so feel "wronged"), or we are just saying the exact same words each and every night (like a doll who's string has been pulled).
It's at times like these that we are tempted to just withdraw from God and become "silent". I recommend the COMPLETE opposite of that. PRAY more fervently than ever (not just for what you'd like to see happen, but praise Him for all the ways you HAVE been blessed). POUR yourself into scripture, song, and interactions with other Christians (church, small groups, breakfasts/lunches). And finally, PUT your faith in your Lord and Savior Jesus Christ that He knows what He's doing (even though you can't see it right now).
End your silence if you've become quiet. God is ALWAYS with you, is ALWAYS listening to you, and will NEVER abandon you. So, "trust" in His current answer, "seek" His continued guidance, and "know" that His timing will be perfect in the end.