What fish can i keep with male betta?

Well your pretty limited with the betta. If I was you I would get a small tank for your betta because bettas are shy and timid in 10 gallon tanks. Heres a basically complete list of fish they can get along with. Zebra danios, Lemon tetras, platies, corydoras catfish, most other peaceful tetras, plecostomus, ottocinclus, cherry barbs, neon tetras, most catfish, african dwarf frogs, snails, and black kuhli loaches.