I left my job last year where I worked with my best friend. We met at work and have been best friends for five years and go on holiday and family events etc. Since I have left my best friend has hardly been in contact with me. In the past 8 months I have seen her twice. Due to mental health I haven’t been in contact with a lot of my friends. I told my friend I needed time alone and she didn’t reply now haven’t heard from her in three months. She’s constantly posted pictures of herself going out and I know she is always on her phone. I’m angry and upset. Before we stopped speaking to me I told her something really important and it took her three days to reply to my message which just makes me think she doesn’t care at all. Do I just leave it and move on?