So, do you have a devotion to the Blessed Mother and not Her Rosary? Again, I was just curious.
If we define “devotion” loosely, then anyone can have a devotion to Her. True devotion to Her grows not overnight; thus, one can have some sort of devotion to Her without having the real love for the Rosary, but over time, when his or her devotion becomes deeper and more trueful, he cannot say no to the Rosary; this does not imply one who prays the Rosary automatically has a true devotion.
There are also some sorts of false devotions to the Blessed Virgin Mary, and here is the words from Saint Louis de Montfort:
1- Critical devotees: "…who deep down in their hearts have a vague sort of devotion to Mary. They criticise nearly all those forms of devotion to Her which simple and pious people use to honor their good Mother just because such practices do not appeal to them. They question all miracles and stories which testify to the mercy and trustworthy authors or taken from the chronicles of religious orders.
2- Scrupulous devotees: “they fear that by exalting Mary the are belittling Jesus… We should go directly to Jesus since He is our sole Mediator. There is some truth in what they say, but the inference they draw to prevent devotion our Lady is very insidious. It is a subtle snare of the evil one under the pretext of promoting a greater good”.
3- Superficial devotees: “are people whose entire devotion to our Lady consists in exterior practices. If they do not feel a warmed in their devotions, they think they are doing nothing; they become upset, and give up everything, or else do things only when they feel like it”
4- Presumptuous devotees: “are sinners who give full rein to their passions or their of the world, and who, under the fair name of Christian and servant of our Lady, conceal pride, avarice, lust, drunkenness, anger, swearing, slandering, injustice and other vices.”
5- Inconstant devotees: “are those whose devotion to our Lady is practiced in fits and starts. They start by embracing every devotion to our Lady. They join Her confraternities, but they do not faithfully observe the rules.”
6- Hypocritical ones: “These hide theirs sins and habits under the mantle of the Blessed Virgin”.
7-Self-interested devotees: “who turns to her only to win a court-case, to escape some danger …”
source: True Devotion to the Blessed Virgin Mary - by Saint Louis de Montfort.