I've been in my own head endlessly thinking for so long. I never had that social appeal my brothers/friends had and I always thought, like the OP, it was because I didn't try. There was a period in my life where I had to realize that to myself I was this amazing person who dreamed these amazing dreams and felt the wonders of the world, but I could never get anyone to see it.
People will always see me as a boring person. Although it isn't always fun to watch as people distant themselves from you for it, there is a good part. Let's face it, if you're boring and people don't want to be around you because you don't do what "acceptable" thing is like being a funny guy or w/e then the people doing this are probably shells of uninteresting creatures.
This is just my opinion and I know there are great people who are also funny, but when I see a group of people and the only thing holding them together is a collection of personalities that make everyone laugh I can only think that if you took that generic everyday humor away there wouldn't be anything there. I've tried to engage with many funny people on a 1 on 1 basis and it feels like I can't get anything real from them. It's almost like funny people are uncomfortable when they can't exercise that skill.
To sum up this insanity, you may not be boring OP, your inward process may just be much more interesting than the average laugh it up, don't talk serious, person can handle.If you notice something, the people who are close to you and listen probably think you are one of the interesting characters they've met.
(It should be noted that funny can be interchanged with socially skilled, cool to be around, people want to be around, gatherers of the attention, ect)