Amy, If people are asking questions, you can always say that you would prefer not to talk about it at this time and let's just enjoy the family reunion for now. I know how it is when you are sitting there and observing couples and how they are interacting w/each other. It does bring back a lot of memories, but keep the happy memories close and pull them out of the box periodically and know that it wasn't all bad. Okay?
Yes, I do understand that people will think it's your fault, but you know what? You can't control what other people think and you don't owe them an explanation about what is going on in your situation. The only person and feelings you can control are you and your own feelings. Many of those same people will put two and two together and come up w/four as time passes.
Don't allow them to push you to move on. They don't understand MLC and until they walk a mile in your shoes, they won't understand, they mean well, but they don't understand. They just want you to be happy and get over the situation quickly. They don't realize that what's happened is just as bad as someone dying unexpectedly.
Amy, you are stronger than you think. Have faith in yourself and the man upstairs.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.