<human>: Title says it all. My girlfriend of 4 months has been suffering from anxiety and depression for a long time. She has been formally diagnosed with anxiety disorder, but has not taken anything for it for years. She said her symptoms vary depending on the day and what is going on in her life. We had an argument the other night where she mentioned she's "afraid of being left". Her dad left her and her mom when she was little, and she's had a slew of short term, unstable boyfriends so it's absolutely understandable why she'd feel that way. The next day she said she was feeling guilty for our conversation the previous night and that it "wasn't fair" for her to bring it up. I disagreed and told her I want our communication to be open and honest, but she has been trying to hide her anxiety/depression since then. I really want to help her, but don't know where to start.

Long background story aside, I want to help provide a more stable environment for her where she can work to control her anxiety but have no idea where to start. Those of you who have an anxiety or depressive disorder or have loved ones who struggle with the conditions, what are things you've found that help? What are things to avoid? And for children of divorce, what can I do to show her I am wanting to be a stable force in her life?

Thank you all in advance for your time.

Can you give me the gist of the text in a nutshell?
<bot>: girlfriend is anxious and depressed, what can I do to help her know I'm here for her and want to help?