When you're in a new relationship, it is natural to feel slightly shy talking to your partner about certain topics but once time passes, you develop comfort with your partner.
If you've been with your partner a while, hesitation shouldn't be in the picture anymore.
You should be able to share anything with them without dithering. If you have something on your mind, with the right person, you'll have it right out on your tongue.
And if you feel like you're still not comfortable with them after you've been together for a long period, you'll know you're not with the right person.
You Can't Count On Them:
With the right person, you can put all your trust in their hands because you're sure that no matter what, this person wouldn't let you down. But when you're in a relationship with the wrong person, then you won't be able to trust them.
This isn't about the kind of trust where you ask them to bring laundry from the dry cleaner or let them decide what movie to watch, this is about the kind of trust where you'd actually consider their suggestion while making a major life decision, like what college to pick, what career choice to make, what next to do in life and so on.
If you feel like you would never reach a point in your relationship where you can trust your partner enough to make these decisions with you, then you might want to take a step back and reevaluate your relationship.