Feeling lonely.

I’m a single mum of two beautiful children, I only have one close friend and the other friend I use to have has just all of a sudden started to ignore me without any explanation. I have had my second child three weeks ago and I haven’t gotten any visits by anyone except my neighbour and family. My friend was supposed to see me which we had planned but she never ended up coming because she got caught up with time, with her boyfriend and seeing her friend for dinner. I felt so lonely that day and I don’t know what to do, I have tried making friends on here but it never works out, I was put in a mother’s group but haven’t been able to go as they only wanted the newborns there not toddlers and I had no one to look after my eldest, I try making friend when I’m out and about but it never works out, I have never had many friends because I’m an introvert and can deal with too many people at once, but right now I feel like I need someone to have a close bond with, for our children to play together, is anyone in the same boat and would like to be friends? I’m in the eastern suburbs area.