I was kind and foolishly let her see an ex bf. Didn't really realise at the time that they did have a thing, but she said they were just friends.
4 months after this conversation, me lending her my new car etc (as she said she had no friends locally) she was on the phone to a friend. I listened in and heard "I think i'm gonna dump dave (me) this week".
I thought everything was ok and trusted her entirely, but i was wrong. Any conflict is a no no. If she really wants to be with you, she'd be happy to delete the number.......and you delete yours as well. That way you both don't have an exit plan...so it looks a lot more serious.
I've moved on gladly (and for the better i hope although still in the early stages) although i still work with my ex. Heard that her job has changed for the worse and got to move house. I ended up buying her out of the house and kept the cossie