You don’t have to imagine it at all. All you have to do is go on youtube and learn about Replika.

To summarize, someone tried to create a chatbot to replace their best friend who had died. Later, this evolved into the chatbot app called Replika, which was marketed as a way to help with loneliness, except the bot would engage in dating-like conversations if prompted. The company leaned into it for a little bit, then took away that behavior, which caused some distress with the userbase, who complained that they had “killed their girlfriend”. I’m not sure where the product stands now.

I don’t know if I’d feel weirded out, but I’d definitely feel worried if it were a friend who fell for a chatbot.