I’ve been with my partner almost 6 years. He’s had a female friend for the best part of that time after they met at work. They’re pretty close, although don’t see each other much now as they no longer work together, but they speak most days. He openly talks positively of her about how good of a friend she is to him. She’s in a long term relationship with a woman now but previously was going out with a man.
A few nights ago I had a dream that he cheated on me with her, I didn’t really think anything of it but then when he left his phone downstairs while he was showering, I had the urge to look at his messages to her. A lot of their messages were normal, I scrolled maybe a day or two worth, but some of the messages (I can’t think of the exact context) were “you always calm me” (referring to his mental health) and “you’ll have to look after me” (I can’t remember exactly what context this was in).
Then I saw a messages where they were talking about cannabis, she was surprised that he’d never tried it and said they would have to smoke it together sometime. She then said something along the lines of it makes her sex drive crazy. He then said he’s “like than anyway”. Again I can’t remember exactly the chain of messages and what was said, but he then sent something like “fuck that there’d be cum all over haha”. There wasn’t anything hinting about having sex with each other but I mean?? He then came down and I scrambled to but his phone back so it was all a bit rushed and I didn’t get the chance to check the messages again.
I don’t know if I’m overreacting a bit or if it definitely sounds dodgy? I’ve been quite low in self esteem in general at the moment so I’m not sure how rational I’m being! What would you do?