Social skills definitely have something to do with it, but these are hard to quantify since there are a variety of ways that people relate to others, many of them with considerable success. It really is a matter of whether or not you have found your Feng Shui (figure of speech) in relating to others and have that developed that special "It". "It" is not a given thing (people in circumstancial isolation, such as prison or homlessness, lose their social skills foremost), but comes from
1. Confidence in self-exposure,
2. Practice and Interaction,
3. Analyzing Mistakes
The idea that social skills are naturally endowed stems from a certain type of personality (extrovert) that gravitates toward those three, but anybody who isn't One Hundred Percent happy with being completely alone can become comfortable with these habits.
Don't get rid of that vivd imagination and dynamic mind just because it's an internal trait, but share it with other people in an engaging (meaningful to them) way, and good results can be expected. If not, the problem might be in your environment or with the individuals that surround you. You don't have to be slave to the social structure, but ...