K,
Even if boyfriend's kids were nice to your face that doesn't mean they'd be nice behind your back. I saw a very dear friend destroyed by 2-faced, back-stabbing stepchildren. Just a warning. Watch your back if you decide to continue the relationship. My friend had money, a house, a car, wisdom and health. Now she struggles to just make it through one day at a time. This isn't to scare you. It is simply to say, "Be Alert!"
bonnie rose