Be111a

I'm having an issue IMing a friend on my friends list? I can see his messages but he can't see mine. I've seen him face to face and we can see each other.He is not blocked, so what else could it be?? Please help! I tried to delete him and befriend him again. I even logged out and reinstalled. I'm wondering if it's on his side but i'm the only one he is havin issues with as well. He def knows it's not my fault because as i befriend him i type my messages. Notecards or tps won't go to him either. Thanks for your help tho. Anymore suggests? I'll try anything cuz i dont know what else it could be...