Insecurities or Not

Me and my significant other are walking around hardly talking we talk when we need to say something. I guess its just me I can't get over that he would talk over our personal stuff with some girl he takes the bus to work with. he says that I talk to a lot of people and while yes that is true they are acquaintances not friends. I do not tell them my personal stuff especially financial. I feel like now ever time I see her she will be thinking about me possibly filing for bankruptcy.he also tells her about his problems at work. I said it may get boring to talk about the weather or pigeons or whatever but oh well. I wouldn't even care if he told his co worker who he has been working with for 10 years but someone you meet at a bus stop and there are other people who have been taking the bus with him for years. I just don't like this.I feel like it can become something more. I think I am getting obsessed with this and maybe dwelling on it to much but I cant help it. It bothers me. He will be on this schedule for another month his time to leave for work doesn't change till may and she seems to be on a rotating schedule cause they don't see each other everyday but what if some of her days fall on his schedule then what.