Why are we involved in libya and not syria?

about 300 people have been killed in the past two weeks in syria. why are we helping libyan rebels out and not syrian? both leaders are killing "innocent" protestors, but we only help one country. why? is it because libya has more oil? (i persoanlly think we shouldnt have helped libya at all so dont give me BS about how america shouldnt be world polica, cuz yur only preaching to the choir, but this question came acorss my mind when i saw the syria issue in the newspaper)