Telling SO your preggers...

I was talking to my SO last night and asked him how he wanted to find out if I was pregnant(currently on TWW) I said did he want to be there when I tested or if he was happy to come home and have me show him a positive test. He just shrugged and didn't really care much at all and said he just assumed I would know and tell him then do a test again. I don't know how I feel about it. I know deep down he's scared but thought he would want to be more involved....