I'm sorry about your losses.
It's ok to not handle things like everyone thinks you should. If you don't want to be around everyone for awhile, then just don't. Tell everyone exactly why and hopefully they'll understand. Everyone handles things differently. For me, when my SIL had a baby, I went and just held her for as long as I could. After I did that, I just knew I wasn't going to give up ttc and although it makes me sad thinking about what I missed, it also helps me to know what I'm looking forward to.
Do what is best for you. Realize you don't have to be strong for anyone. Break down and cry when you need to and take things one day at a time. Have hope for the future and don't give up.