Oh, I'm so happy for you and I know how excited you must be...from February is such a long wait for you both.
Zhoie is an a singleton and she will be 3 in January. I work from home, so we are always together. I must admit, she is a lazy girl and I do worry it's boredom. I've often thought of getting another but again, working from home and being on the phone, I'm not sure how that would work out for us. Zhoie knows the routine and isn't a barker, it works great. When she occasionally she's my friends 3 yorkies, she cries she is so excited to see them. That will last for a little while, they run, greet one another, then for Zhoie it's over. She doesn't know how to play dog play with them and then will want on my lap or whatever. I'm not sure she would like it 24/7 and she doesn't like to share me, at all.
You know your baby and you will recognize if a playmate or snuggle buddy is needed. If there is a lot of alone time, maybe, but perhaps not....you will know in your heart what is right for your baby.