How to fix iPhone message app?

For some reason my friend thought it would be a good idea to type in every single emoji icon 30 times and send it to all my contacts luckily I caught him after only sending to two contacts but now the message app is nothing but a blank screen ad only stays open for a few seconds its been a day now and I've tried closing the app and restarting my phone and just leaving it to load for a bit but it still wot do anything help would be appreciated

LOL! Thanks NOW SOMEONE HAS THE SAME AS ME. All you need to do is get a message from another friend and it should work again. ERASE WHAT YOUR FRIEND SENT YOU RIGHT AFTER IT STARTS WORKING! DON'T OPEN THE CONVERSATION AND GO TO THE ENTIRE THING BECAUSE IT WON'T WORK AGAIN. JUST GET A MESSAGE FROM A FRIEND AND ERASE HIS OR All YOUR CONVERSATIONS. I do both if I have to. Good luck. My friend did this to me then i got a message and it worked again. Yea I know pain in the *** if it goes for days lol.