If you post some pictures of your chicken in question, we may be able to help you figure it out for sure.
If you don't want to raise any chicks, then it's entirely up to your preference. Personally, I'd keep him because after adding a roo to our flock, I wonder how we ever did without (and we have no plans for chick raising any time soon, either...unless some interested friends/family go over the edge and decide they want to start flocks of their own ).
Just make sure the area you're in permits roos and that you (and any neighbors with the potential for impact) understand that roos crow, you can't stop them, and any time of day/night is game (though they usually won't crow at night without some source of light or unless something is disturbing them). Roos also don't often do well with human beings that are less than 4ft tall, so if you have children, you may want to think twice.
However, assuming he gets through puberty (and they can be crazy, hormone driven nutbags during that time) and turns out to be a pleasant individual, they're a joy to have. Very talkative, inquisitive, and typically vigilante; they make a very interesting contrast to the behaviors of the hens.