I have no reunion experience at all....just my personal observation here on your posts...
You've done your part, kwim? You've assured them of your love, kept the door of communication open, respected their feelings etc. What more can you do? I have no idea of course why they are reacting this way and wouldn't presume to know, but honestly...it's not your battle to fight. You shouldn't have to be on eggshells with them or try to make them feel better.
I know they are your parents, and any kind of strain on relationships is difficult. But the bottom line is, in ANY situation, there's only so much a person can do to reassure someone or try to make a situation easier for someone.
I think honestly, I'd leave it alone for a bit. Call them as usual, talk about things you normally do, enjoy your visit etc., but not make the reunion a focus of things right now. Not to say you want it like the "elephant in the room" either, just saying that maybe if you kind of take a break from the reassuring, it'll be less stressful....for YOU. You deserve to be happy and all you can really do is what you've already done. Hopefully your parents will see that whatever emotions they are feeling, they have a right to feel, but as your parents...they need to deal with those separate from you and be there for you.
