If it helps ease your pain, then keep believing that they do and that you'll see them again, eventually. I happen to believe they don't (and given how many of our hounds who have passed over the years, I don't think I WANT to be bombarded by them all when I arrive) but each person deals with such a sad loss, in the way they feel most comfortable with.
My sympathies, but concentrate on knowing your dog is now out of his pain and you have nothing to feel bad about.
Re these TDs, I find it amusing to see them when people are only giving their PERSONAL OPINION re an after-life, for humans or animals. It's not 'wrong' to express a personal view especially when what happens to any of us after death, is UNKNOWN. TDs should only be used when the answer is clearly wrong.
Later - see, some idiot has added to the one TD I had before ............ it really is laughable.