Shut UP!!!

What do you do when your spouse talks your EAR off?! It is annoying and irritating and at times, doesn't matter WHAT I'm doing he still continues to blabber away. About nothing, about everything. I get involved to help the conversation come to an end but then its on and on about something else. Of course I already feel like I don't want to be around him and constantly finding ways to escape being near by but he's nosey, talkative, and too involved with negative discussions. I'm trying to shed as much negativity as I can in my life but he's starting to feel like such a weight on my shoulders. I've tried politely asking him to wait until I'm done reading or whatever but even that doesn't go over well and is the cause for MORE talking. He needs a friend! He needs SOMEONE else to talk to. We have gone back and forth about this throughout our relationship but with all this tension and stress....I have a hard time being his mom, counselor, friend, and wife all in one.