Hey Lavender -
Yes, keep it up on your end! If he's anything like I was he'll be pretty pissed that his parents won't respect his boundries. I was livid at first, but it calmed down after a while. I even spent some holidays, esp Thanksgiving, with some of my relatives because there was never any cut and dry law/rule denying that day. And I always made a point to call my mom and tell her to have a "good" day on her birthday, just to let her know I was thinking about her.
Tell him you miss him ALL THE TIME!!!!! and you love him too
Keep in touch with us here and let us know how it goes.
Jamee