Here's a look at the broader picture. Hope it is helpful.
Throughout the Bible we find it repeatedly implied that each individual soul has its tutelary angel. Thus Abraham, when sending his steward to seek a wife for Isaac, says: "He will send His angel before thee" (Genesis 24:7). The words of the ninetieth Psalm which the devil quoted to our Lord (Matthew 4:6) are well known, and Judith accounts for her heroic deed by saying: "As the Lord liveth, His angel hath been my keeper" (xiii, 20). These passages and many like them (Genesis 16:6-32; Hosea 12:4; 1 Kings 19:5; Acts 12:7; Psalm 33:8), though they will not of themselves demonstrate the doctrine that every individual has his appointed guardian angel, receive their complement in our Saviour's words: "See that you despise not one of these little ones; for I say to you that their angels in Heaven always see the face of My Father Who is in Heaven" (Matthew 18:10), words which illustrate the remark of St. Augustine: "What lies hidden in the Old Testament, is made manifest in the New". Indeed, the book of Tobias seems intended to teach this truth more than any other, and St. Jerome in his commentary on the above words of our Lord says: "The dignity of a soul is so great, that each has a guardian angel from its birth." The general doctrine that the angels are our appointed guardians is considered to be a point of faith, but that each individual member of the human race has his own individual guardian angel is not of faith (de fide); the view has, however, such strong support from the Doctors of the Church that it would be rash to deny it (cf. St. Jerome, supra). Peter the Lombard (Sentences, lib. II, dist. xi) was inclined to think that one angel had charge of several individual human beings. St. Bernard's beautiful homilies (11-14) on the ninetieth Psalm breathe the spirit of the Church without however deciding the question. The Bible represents the angels not only as our guardians, but also as actually interceding for us. "The angel Raphael (Tob., xii, 12) says: "I offered thy prayer to the Lord" (cf. Job, v, 1 (Septuagint), and 33:23 (Vulgate); Apocalypse 8:4). The Catholic cult of the angels is thus thoroughly scriptural. Perhaps the earliest explicit declaration of it is to be found in St. Ambrose's words: "We should pray to the angels who are given to us as guardians" (De Viduis, ix); (cf. St. Aug., Contra Faustum, xx, 21). An undue cult of angels was reprobated by St. Paul (Colossians 2:18), and that such a tendency long remained in the same district is evidenced by Canon 35 of the Synod of Laodicea.
Thanks for post...you’re very kind.
I believe it is quite a stretch for the Bishop to say: "Scripture says we are given an angel as a guardian to watch over us and guide us." I wish it were true, but we have no way of knowing.