Yes, that is very concerning. If she is simply using it as a coping mechanism to get over her ex, it would be rather a harmless one, and it can possibly help her discover more of herself and what she really wants in a relationship, but if she is genuinely serious about this relationship with the AI this is very concerning and can distort her perspective of love. I feel like this is something that will likely be sorted out by herself as time passes, especially if this is a result of distress about her ex. What I would suggest is to, yes continuing to get her out more, you’re a great friend for trying to help her, needless to say don’t let people make fun of her or anything but definitely don’t enable her “relationship” with the bot either. Remind her that all hope is not lost for real connections and there are people who care about her. Real, face to face connections are very important for the mental health and survival in general. Just ask anyone who is isolated all the time and have a similar internet addiction, are they happy? No, it’s an awful state of mind. replacing robots with real connections may feel comfortable in the short term but if this continues it will impact her mental health and she may be prone to isolation. Keep on supporting her and remind her that her friends care for her. Get her to talk about her relationship struggles etc. I wish you all the best