I have posted on the same topic before anyone jumps in...
In my old job I had a rough time. Other colleagues were being very unpleasant towards me. One colleague though, really stuck by me and was very supportive. When I left, I felt we would stay in touch.
She was acting fairly strange in the lead up to me going however. For example, one morning I greeted her at the door and she was fine. I was then chatting to other colleagues and she sort of moved away from us all and seemed really down and a bit off with me. I messaged her saying she could come to my home for a visit after I had left the job. She did but there was a mix up and unfortunately I was not at home. I told her to come back later that day but she said she couldn't. We kind of lost contact then until I bumped into her in town and said again that she should come for a visit but she didn't seem that keen.
Again, Didn't hear from her for a while until she texted me asking if I would like some books that a friend of hers was giving away. I didn't but enquired after her wellbeing. She has some chronic health issues and said she was struggling and not able to work much at the moment. I said I would keep her in prayer. That was a few months ago and I haven't initiated contact since. A friend through my church asked how she was ( I have spoken about her with them previously ) and I admitted that I didn't actually know and she said 'Don't you think as a good friend and Christian that you should have seen how she is?' Yet I feel like the friendship has run it's course and not everyone is meant to stay in your life.
I do have new colleagues who have turned into friends now but does this really make me so awful ?