You aren't losing. Many people feel life is without purpose. Your purpose just hasn't been revealed to you yet. Give it time. You aren't just "existing." Someone is out there waiting for you just like you are waiting for them! As for the social interaction, My input, if it is ok to say, would be to try and make yourself more involved. It is great that you are starting to get over the loss. But it might still be affecting you as in you are afraid to open up to people again. Open a little but don't wear your heart on your sleeve. Life rolls on and it is hard to see others around you happy while you aren't. I know. I wish you the best of luck and I sincerely hope you start feeling better.