I Currently Want To Casually Date, Kinda Like A Player, Where Can I Begin?

Im a 21 year old guy, and the reason I ask this question is because I am young and in college. Im only feeling and getting older and i believe that life is too short to fall in love. whenever im hear of a friend being engaged, i automatically feel old and it feels devastating. i even begin thinking a lot about tomorrow.
first two years of college, i was in a comm. college so i rarely made connections. the good ole school & work. transfered to a university as a junior last summer. as far as career goes, i am ok.
i just want to play around. dont get me wrong, im a nice guy but im questioning if i have been living life to its fullest.
any opinion or advice?