I want to find my betta a life partner?

Betta fish are fighters you can't put any other fish with them. That's why they are kept alone even in the pet stores. The only way bettas can be together is if they are mating. If you are interested in mating them you need to get a male and wait for there to be bubbles all around the top of his bowl, that means he is ready to mate. Just put the female in, let them mate, then take her out as soon as posible, or he will attack her.