*hug* majorlover i am so sorry for your loss. i can't stop crying now. you did the right thing being with him and letting him go peacefully. i had a really hard time because i didn't get to be with muffin in the end.
one thing that you need to remember is to let yourself cry when you need to. honestly there wasn't a night that i didn't cry for about 4 months after she passed. i don't think you will ever stop missing timber, he was a major part of your life.
This has to be so difficult.. I just got my dog about a year ago and for this same reason I didnt want to even get a pet for fear that someday I would too, have to put her down and how babdly it would crush me..
Its even worse now that I have gotten her she is literally my kid. She does everything with me family dinners, trips, walks, shopping and she even likes to watch tv with me. And im so scared even though she is only one year old..
I cant even imagine what your going through it has to be so difficult im scared now and your time has come but I have heard that it is much easier on the pet when your are there with them to comfort them when they take their last breath..so I believe you did a good thing being there with him, and just know that it may have been hard on you but I bet it made him feel alot better. im so sorry about this.. I hope you can make it through.. And possiably in time you could get another pet not to reaplace your beloved one but to help you cope. just like your dog did you needed him most. Good luck