We are to only pray to God and rely upon Christ for our salvation. Anything else is against the Word and is blasphemous.
As for "praying" only to God, once again that demands some refinement of what you mean by "praying."
Praying does not equal adoration. We are all members of the Body of Christ, constantly communicating and sharing spiritual goods with one another. That is not adoration: it simply is what being "members of one Body" means.
That is a relationship predicated upon being alive to one another in Christ.
This video CASTELLER says a lot to me. "I pray for you, you pray for me."
Please watch it, because I do mean it in a heartfelt way.