How to treat Separation anxiety Disorder in adults?

I’m wondering, if any of you have heard of Separation anxiety disorder in Adults Asad? I think I only have two of the symptoms such as extreme anxiety and fear when separated from major attachments. and, fears that harm will befall those close to them. My reasoning for asking this, is because I have a friend of mine that’s been there for me since we first met which was over two years ago. She is so special that when she comes over to help me with certain things like finances, I get in these random crying moods before she leaves sometimes. When I start crying, she can’t leave right away since this makes her feel bad and she starts worrying. She lives in the same town I moved to which is Mt. Pleasant Michigan. If I have the onset of Adult Separation anxiety disorder Asad, how would I treat it? Fortunately, I don’t have all the symptoms just the two I mentioned above. This person is one of my major attachments in my life since she has been there for me and so forth. She’s married and has 6 children who are grown and some of them are married and have children of their own. Since I’m 25, and this person is 65, that just shows how much of a mentor she has been. If you could give feedback, that would be great.