Why is he like this? Please read

Before we got together, my boyfriend would think I was funny. He would say that I made him laugh all the time. I showed him things i thought were funny and he would think its funny too. Now we’ve been together for 9 months and whenever I send him something I think is funny he just says that I have a bad sense of humor and that everything I send him is stupid. I would send it thinking he would find it funny too but then he just says it’s not even funny and it makes me feel kinda bad because I thought we had a similar sense of humor because that’s a thing that drawn me to him in the beginning. I wanted someone to laugh at the little things with and he just brings me down with this. I know you’ll probably think this is nothing but Is he bored of me?