D.B.
You are assuming, erroneously, that a 17 month old has the emotional maturity of a 10 year old, and is capable of giving you a message to hurt your feelings. She does not. You are also making her responsible for your emotional wellbeing, when the opposite is true.
She's a toddler. She wants what she wants when she wants it. You will have a stronger and more capable little girl (and teen and woman) if you encourage her to be independent and confident - that means leaving your lap and bonding with others who love her (grandparents, dad, aunts/uncles, trusted babysitters). This helps kids separate well when they go to daycare, preschool, elementary school, and eventually college or the working world. You should encourage her spirit of exploration and her willingness to leave your side. You should do this from a position of confidence that you are, and always will be, her primary source of security and confidence. If you cannot trust that, you will both be big masses of insecurity for a long time.
If you need help with your own confidence, by all means, reach out for help and get some short term counseling. This can help you with the many stages of childhood development too, so you know what to expect. Kids don't come with a manual, so you should feel fine about getting some additional info and support.