While it may seem tempting to want to change the other person, the only person that you can definitely change is yourself. Working with a mental health professional to improve some of your own behaviors will ensure that you can use your best judgment to form healthy relationships moving forward. Additionally, the other person in the relationship can only change themselves. If they want to change, then they will do what is necessary to make sure that they change. It’s not your responsibility to change them-this is an important yet difficult thing to keep in mind at all times.