Should One Say Mama or Mommy To Baby?

I find myself using "baby" words -- words that are easy for baby to say ... like mama, dada, baba, etc. Is this right? Or should I use the real word "mommy," "daddy," and "bottle" and they will interpret that and say it in a way that they're able to do so??? In other words, when I say "Mama loves you very much." Should I be saying, "Mommy loves you very much" instead? What do you do? Do you use Mama or Mommy? I'd rather be called Mommy once she's able to talk, but I figure Mama is easier for her to understand and say right now. She's only six months old, and hasn't said any first words yet or anything. She just babbles...but I do say the words Mama and Dada over and over again to her, in hopes she'll be saying one of them soon.