ouch to the ego ;_;

Oh, I had that very same thing happen to me once - I felt horrible afterwards, and convinced myself that I had somehow managed to appear weird or creepy.

Then I received a reply a few weeks later, and it turned out the person in question was just super shy and slow when it came to answering messages.
We´ve had a bunch of conversations since, and although they aren´t too active online, they still remain one of my favourite artists.

Long story short, there is probably a reason behind all of this that hasn´t got anything to do with you in particular.
Maybe your message just got buried in the tons of notes they receive daily, especially if they are a successful artist, or maybe they just aren´t used to random (albeit lovely) people on the interwebs who just want to say hi and talk. Not everyone can be a sociable person, after all.

In always too shy to note people about stuff like that ;;

oh man that's the worst feeling!!

Yeah, I know what that's like. Been there, done that, felt like dirt.

Awkward dirt.

I remember sending a few messages to someone whose web comic I liked a few months back, telling them I appreciated their work, and also trying to give them some words of comfort and encouragement because they mentioned in some then-recent posts that they were feeling down. Never got a response. Like Hukeng said above, I felt like I came off as an intrusive creep by even trying to talk to them. To this day, a part of me still wonders if they even saw the messages.

I know that feeling. It is like part of the internal structure holding you together just weakened slightly. Very strange feeling that.

Been there, done that, frog.
At least you had the balls to do it in the first place. That's the first step.

Babe, you are a cool guy and I bet it's not about you.