How do I keep a small potted Christmas tree alive all year round?

2 weeks before Christmas I bought a potted 2’ Christmas tree. I live in an apartment with a balcony. I would like some hints as how to keep my tree alive all year round? What would be the best conditions to grow the tree under (keep it on the balcony)? Any advice would be more than welcome! I just love my little Christmas Tree…:)
Thankyou…