about 7 years ago i had an awesome affair with this girl at work. we used to go to my bro's apartment at lunch and afterwork, boning in cars, etc...made for some very interesting workdays, as well, as we'd get dirty at night then go back to our respective partners and come back to face eachother the next day, etc. went on for about 4 months then we both decided to stop, knowing full well it was wrong on many levels.
long story short- now we're married and have a beautiful 2 year old girl + a boy due in june.
life's short and funky, young bro. i say go for it if you are both down with each other. no need to waste a golden opportunity. but you're still very young so just do if for fun this time and try not to let it get too serious too quick....