Okay, here's the deal.
I'm almost 16 & my boyfriend is 18.
We have been together for almost a year.
I moved so we have a long distance relationship.
He's visited before but at my aunt's house.
I admit we were overly affectionate around her.
I live with my grandparents now, and I don't want them to feel disrespected when he visits.
But I miss him so much and it's so hard not to be clinging to each other when we only have less than a week together every couple of months.
I think my boyfriend and I have a very mature relationship for our age, but I feel that my grandparents don't take my relationship seriously.
So my questions are:
What is too much PDA around parents/grandparents?

And how can I keep myself away from him when I know we have such little time together? :/
What are ways to show my grandparents that we have a mature relationship?? Like how do I get them to take us seriously..?
And last question is laying on my boyfriends lap inappropriate? My aunt was against me doing that and I honestly don't know what the problem with that was if she was with us at the time.
PLEASE HELP