I'm dumb but not that dumb

Idk how to explain this without sounding pretentious, but that's not my intent as I know that I am an idiot. So many other people around seem even more dumb though. They are like dogs or something, just existing, not causing any problems, generally pleasant, but there is nothing deeper. They will think of me as a friend and I just don't get the point. I could talk about some real deep shit and get no reaction, then say the most retarded joke and people will laugh and praise me. I honestly feel that they are patronising me or something. they could look like they are real deep in thought and i ask whats wrong and theyll just say something like "oh i was thinking whether to go to taco bell or KFc for dinner tonight". or i will text them something serious and not get a reply for awhile worrying maybe they were effected by my words but they just reply later some dumb crap like "sorry I was taking a dump while high". yet they expect me to reply when its about their feelings. they never give back whst I supposedly give to them, they always want more but it's so boring like I am just sitting in a room full of cats. they're nice but in the end im just talking to myself. sometimes I will meet those above average intelligence people but of course they just see me as a retard so I dont have a chance with them.