I have 1 rabbit and 1 guinea pig.. i want another guinea pig would they accept each other?

It sounds like to me that you house the guinea pig and the rabbit together. Correct me if I'm wrong, but if you do please don't do that. They are two different species and they're not supposed to be housed together. But back to your question, it really depends on the personality of your male guinea pig. Some of them will fight together, but some of them will be buddies forever. If you do get one, I would keep them in a big playpen and supervise them for an hour or two. Make sure the cage is big enough for them to have their own space. I would get a baby male guinea pig because there's more of a chance of acceptance if he grows up with the older one. As for the rabbit, it won't affect him. You could get another one but I don't know how two male rabbits in the same hutch would get along. Best of luck! :)