I think your doing the right thing to focus on each other hon, ignore everyone else, you dont have to be happy for everyone.
Me and my oh used to find it so tough to hear pregnancy announcements, esp when his brother's wife conceived on their first go. We got through it by just keeping out of their way as much as possible so when we did see them we could manage to keep up the pretence of being happy, then behind closed doors we had loooooong conversations and chats about how we really felt. It def helps bring you closer together!
We then decided to plan our lives without kids, started doing things we'd always wanted to do together like planning to emmigrate and starting an OU degree, booking swish hols to posh resorts and going on lots and lots of dates with each other. It helped as it gave us an exciting future to look towards, although we never deep down gave up hope of kids we just stopped trying and tried to distract ourselves and focus on each other.
As it turns out just as we'd booked the hol (non refundable typical) and started the first OU course I got my first bfp in over 3.5 years of trying, so there can be a happy ending and I wish you all the baby dust in the world hon so you can have yours, but in the meantime focus on each other and try (I know its hard) to have as much fun as possible xxxxxxxx