How Do I Know That I Would Make A Good Nurse?

I started a job as a resident assistant at a senior living facility a couple months ago, it's basically like a CNA, except a CNA lisence is not required as a gait belt is the only tool we are instructed to use while assisting the (minimally/moderately independent) residents. Lately I have heard a lot of comments such as "What do you plan on doing as you career?" and "Are you studying" from the residents, in which I tell them that I am doing prerequisites for nursing. I have gotten some really positive responses, such as "You will make a great nurse" or residents saying I am like an Angel, and so helpful. But on more than one account, I have been told that I am in the wrong career, or the residents will act as though I am not cut out for it. I feel it when the residents who I am helping think of me as inexperianced or inadequate. Some of them I am not used to working with as much, and they will just smile at me like I am stupid when I ask a question because I do not know what they want me to do as far as their care plan (No care plan list is updated). I do all I can do be polite and smile with them, always ask them about their day and things of that manner. I know I have only been doing it for 3 months, but it makes me feel so bad the way some of them act or when they tell me that I should not be in this field. I feel so silly for making a post about this, but are they right? How do I know that I will make a great nurse?