You are only responsible for what you positively will. You are not responsible for feelings that you do not will. If you will to love God, to hope in his promises, and to obey the Church that he founded, you will not be held responsible for doubts that you do not will. Think of it this way: Doubts are temptations to unbelief. Just as we do not necessarily will any particular temptation, so you may not will to doubt. If you reject the temptation – even if you must repeatedly do so because the temptations keep recurring – and choose to cling to God through participation in the sacraments and assenting to the Church’s teachings, then you may even grow in holiness as did St. Therese.