On my iphone 6, message wont work

Since yesterday, I have been having problems with my message app on my iphone 6. I get the notification that i receieved a text so when i go to open the app, it goes back to home screen. I tried turning off the phone and restarting the phone. Does not work. I tried turning off the imessage and facetime and restarting. Does not work. I tried making sure the time&date is set to automatic. Does not work. Im really confused. I had this phone for since the phone came out and was working fine. Everything works fine but the message now. Can someone please help me?