I don't care anymore.

I had a group of four friends and two of them are having kids and one is about to enter a relationship. I feel left behind and I feel like nobody cares how I'm doing anymore as they are too busy with their new lives. I freaked out initially because all the people I'm used to hanging out with are gone. I feel like now I'm numb to it all and don't care about anything I'm doing nor do I want to ask much about their lives. I can acknowledge what I'm kind of feeling isn't right, but I don't care! Can anyone relate and what should I do?

maybe you should get a mate:D