Questions: Relationships

Lets say they didn't exactly committed infidelity, not that you know of. However they did this:

- Lied about the whole relationship, even lied about their real age

- Scam you with your money, never paying it back (or even use you for a Green Card)

- They never loved you and you were just accomodity to them

They basically cheated you out of a life (years), a life you could've with someone else.Would this also count as cheating too?

So, recently we found out that my boyfriend of 9 months 17 year old sister is pregnant, about four months along.

We were all supportive, the father-to-be has already stepped up and is prepared to support her and the baby.

However, that's not the issue, the issue is I found out my boyfriend knew since she found out, but didn't tell me.

He said she told him not to tell anyone, and I told him that doesn't include me, we're supposed to tell each other EVERYTHING, and he disagreed - he says if someone asks you to keep something to yourself, that means exactly that.

We've had massive fights over this the last few days, and he won't budge, I keep reminding him how partners are supposed to share everything, and asking what else he's been hiding, and he just keeps reiterating how he respected her wish to keep it secret until she's ready to tell everyone.

Am I right?