The Sacraments of Baptism, Confirmation, the Holy Eucharist, Holy Matrimony, Holy Orders, Penance and Unction of the Sick, as objective and effective signs of the continued presence and saving activity of Christ our Lord among His people and as His covenanted means for conveying His grace. In particular, we affirm the necessity of Baptism and the Holy Eucharist (where they may be had) -- Baptism as incorporating us into Christ (with its completion in Confirmation as the "seal of the Holy Spirit"), and the Eucharist as the sacrifice which unites us to the all-sufficient Sacrifice of Christ on the Cross and the Sacrament in which He feeds us with His Body and Blood.
I an familiar with the Affirmation of St. Louis; most of the so-called "continuing" Anglican churches got their start here, including the one I currently belong to, the Anglican Province of America. There are a number of others.
The 39 Articles which I refer to can be found at or near the back of every BCP since the beginning. Some of them may or may not have been written the way they are for no other reason than to be anti-Rome. I couldn't say. There is also one Article on the error of conducting a service in a language not understood by the people, i.e. Latin.
Perhaps what you are actually using is the Anglican Rite Liturgy which draws much from the BCP but with certain elements of the Roman Catholic mass blended in - that may be a poor way of phrasing it. Forgive me, I don't wish to offend anyone. From what I can tell from reading it, the Anglican Rite Eucharist is a beautiful service.