Do I speak too formally?

I tend to have the same problem as well. But then again, I really wouldn't consider that to be a problem. It's just the way you talk. I'd much rather prefer someone to speak formally, than to speak slang all the time. Speaking formally is a sign of intelligence. I wouldn't worry about it.

You might be on the autism spectrum. Many people who are interested in knowledge and learning and concepts are on the autism spectrum. There isn't anything wrong with it, but it is a minority of people. Learning more about it could help you adapt and find ways to be more comfortable with it.

https://www.bustle.com/articles/134737-9-signs-you-could-be-on-the-autism-spectrum

Speak any way you choose to do so, but be sure to smile a lot. Do not smile like you're giggling nervously or you're uncomfortable; just smile like you're glad to see the person with whom you're talking. Make others feel like you value them. Speak of fun things, too, even while using good grammar and syntax.

Be sure you ask a lot of good questions of the others with whom you're talking, and listen really well. Don't fake that. Listen and be truly interested in what others say. Of course you know not to correct them. You choose how you speak, and allow them the same courtesy of choice.

I tend to spell very easily and had a couple of friends who would never write to me because they were afraid they couldn't spell well enough for me. (We all worked on different touring units with a traveling theater company, and so saw each other a couple months a year. We had to write to stay in touch.) It took a whale of a long time to convince these friends I truly would rather hear from a friend, misspellings and all, than not hear from her because she doesn't spell all that well -- and that I would not read their letters with a red pen in hand, looking for misspellings. Once I finally got them convinced of this, I got letters from them and enjoyed those (decidedly misspelled) letters very much. Sometimes I had to sound it out, because the spelling wasn't good, but I truly enjoyed hearing from those friends.

You may need to work with your friends on this. Make sure they know you are comfortable with their speaking as they choose, and let them know your speaking as you choose is not a judgment on them.

Sounds to me like they're put a bit off by the nature of your speech..like you're coming off as too 'high and mighty',and 'better than thou'. I,however,think if you like the nature of your speech,don't change it. It's refreshing to know someone speaks in complete sentences. I'm like you,I like intellectual conversations,shutting down a restaurant talking about alternate universes is an amazing experience for me. In other words,if you feel it doesn't suit you,don't do it. Don't dumb yourself down,a true friend wouldn't ask you to.

I LOVE that you use correct grammar and speak formally. I think it is important to preserve the purity of the English language. I think it important to acknowledge the different between "who" and "whom" and "if; were" and "wish;were", etc. Find your people who have the same interests that you do. It's important. When you are interviewing for a job, they will really appreciate your formality. There are rarely any people like you nowadays, so keep doing what you do.

Part of it is that you need to lighten up. People who speak in complete sentences and never use slang come off as stiff and pretentious. The other thing is that people rarely want to listen to anyone. Most people want to be listened to. Try listening instead of talking.

I feel like you haven't met the right people. Maybe try to find some similarities you have with others.

I don't think your post sounds too formal. I'm sure there will be other people out there
who like to talk about deep topics, also, but you must remember to pause and let them
contribute to the conversation. That makes it more fun for them. You won't feel as rejected
so much if you only bring up these deep concepts to people who seem like they are interested
in them. Not everyone is. They're not so much rejecting you as they are the subject matter.

i dont think so, maybe you need to hang out with different people

No one likes people who are serious all of the time. Lighten up.

Not formally enough in my book. I feel as if there is something not quite correct/wrong about your choices of words.

Possibly "long winded" as they have other things to do, like urinate for example.

Are most of the people around you cops and similar-minded people?

Or maybe you're just in Vancouver. I've heard things like you can't strike a smart conversation with Vancouverites (they're Angle-Saxon, but very, very uninformed -- NASTY COMBINATION); while most other big cities, there's a niche for most people.