All relationships are about getting to know each other and engaging in healthy conflict. Healthy boundaries, then, are about knowing our needs, effectively communicating them and attempting to respect our partner's needs.
Take some time to understand their perspective. Where are they coming from? Why did they say that? What experiences are they speaking from? Say things like "Why do you say...
Usually you know what your boundaries are, it's just a matter of how you communicate them to the person. There are three ways to do that: by being aggressive, passive-aggressive,...
Ask your parents to help you set boundaries if your sibling isn't listening to you. Just wait until a parent has time to really listen to you, and calmly, respectfully...
Communicate and arrange with the ex and the current partner to remain friends. If boundaries are overstepped outside of the friendzone then this has to be communicated and addressed.
Be direct! Sit down with your partner and share your concerns in a non-accusatory way. You might say, "Hey, I'm having some fears that you're going outside the relationship. Can...
Reinforce the consequences after they cross a boundary, but remember that this will only work if you're consistent. Boundaries don’t work if they are only enforced some of the time.
Stop and think about your relationship overall. Ask yourself questions like "Is this relationship working for me?" and "Which boundaries are negotiable and which ones aren't?"