How can I get rid of this intimidating vibe/factor/look that I give off?

lovehatesme
I had one person tell me at work that I have an Intimidating factor about me. I didn't take an offense to it and he wasn't trying to be either we kind of laughed about because he said that's kind of good thing. To me it really isn't good because it affects my social life not only that when I try to make eye contact not creepy like people tend to turn there heads as if they are scared. I do smile I don't know what it could be? Advice would be cool!
How can I get rid of this intimidating vibe/factor/look that I give off?
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