The best thought, if you think your male needs a companion, would be to get another male. I would get a young male. But with any chin that you want to introduce, there has to be a 30 day quarantine first. This means a separate cage in a different room. After the 30 days you can begin your intro. I know there is a thread here, if you check the search engine, on how to introduce. One of two things will happen. Either they will hit it off and can be cage mates, or they will not like eachother and you will need to keep them in two separate cages indefinitely. You just never know how they will react to one another until you go through the intro period.
If you are concerned that your chin is lonely, a lot of people here have a fleece cuddle buddy as a companion for their chin. I have an only chin and I have one for her. She drags it around to various areas of her cage.
Thanks for asking questions and taking everyone's advice so well. Good luck!