I was invited to a colleagues leaving drinks. I recently left the job myself too and she is now leaving a month or so later. She messaged me on Facebook and asked if I wanted to come. I replied back that I couldn’t make it due to childcare but good luck with the new job. She never read the message at all. Aibu to think she didn’t actually want to invite me? I feel quite isolated and lonely as a single parent, and I would have gone if I could but I just feel like nobody bothers about me.