My boyfriend has been keeping secrets from me?

[Lilly]

I've been with my boyfriend for 8 months now, we're really really close to each other it's like we've known each other for a century, we even share our email/Facebook/twitter/Kik passwords with each other.
2 days ago he told me not to msg him on his Facebook account because he gave the password to his dad because he wants to use it for something. Well, today I logged into his account to check on something, I forget that his dad was using it and that I wasn't suppose to msg him or log into his account, and my eyes fell on a message from his mother, curiosity knocked into me and I read it and I found out she went into surgery last Monday, a really hard one, but he never told me that, he's been casual all week like nothing is going on.

Also his dad and home from another country, he works as an engineer there but I guess he's done with his job and he's looking for another one and he's currently unemployed, but my boyfriend never told me that, he said his dad is on a break from work.