I have an amazing best friend. She's the sweetest and is always there for you. I couldn't have wished for a better friend. We have known each other since we were four and now we're 30. She has always been obsessed with guys. She's talked online with a guy now for four months and then he ghosted her, but she won't believe it. "But he said he likes me" "but he said this and this". I've tried to talk to her to just let it go, but she can't. She even managed to get a hold of his phone number and is calling and messaging him and he obviously doesn't answer. She just called me now and said she found out where he lived and is going to his house to confront him! She's crazy! She's looked up guys number before and spammed them and I always thought she was a bit over the top, but going to someone's house you never met for real just because you're in denial is on a whole other level. It's like everytime she starts talking to a guy she gets so invested and take it so seriously and she's like "but I know him". No you don't! I don't know what to do, her behaviour is scaring me. She wouldn't hurt anyone but it's almost like she's living in some kind of fantasy world, or she's extremely naive or something. Is there anything I can do? I've tried talking to her but she doesn't listen or she doesn't believe me and think I'm the one exaggerating.