It's so natural for everyone to wish you luck and spend some quality time before your off to uni. It seems that meals and fav foods is their way of being nice, and it's only a one off thing so if you gain you know you won't be doing all that again soon! I also think that these food splurge gains as with holiday gains are really quick to lose.
Your going through a change, you should be all over the place or you wouldn't be normal
Good luck getting back on plan, into a routine and back to uni
Happy anniversary
Look forward to seeing your food diary again x