Oh God, I so want to offer to be a female friend to all those on this thread who don't have any - I am in a similar position, in that I have only ever had one female support in my life, and that was my amazing Mum. Thank goodness I knew when she was alive (over a decade ago now) how lucky I was to have her as my Mum, she was the only person who truly loved me unconditionally, and went far beyond what should be expected of a dear Mum (or anyone else for that matter).
Despite having such a wonderful Mum, my childhood was less than wonderful due to what I now realise was a father with some quite serious mental health issues, and sadly he had had a childhood where the parent he adored died when he was still at primary school - his Dear Dad - and he always felt after that that his Mum preferred her elder son to him. So I have been very lucky as a grown woman, to have had my Dear Mum's support, but for over 10 years now, I have also had 'only' my DH, and when it is your DH that you are having problems with - nothing really major thank goodness, he tries his best as my carer these days - I have no-one to share that with.
I do have 2 very special Daughter-in-Laws who I love very much, but they are still very young themselves, and quite rightly, engulfed in their own family's lives, and they both have their own very loving Mum's, so I suppose like a very many other older Mumsnetters, once our Dear Mum's die, we no longer have any female support in our lives. Having said that, it has made me realise that I was the only really supportive female that my DM had in her life after her Dear Mum died (and her DM had unfortunately, quite a selfish streak, so I don't think that my Mum was supported to anywhere near the same extent as I was by mine), so I hope that I was good enough for my own DM.
Basically, I suppose that life is probably quite hard for many people, which is why I would love to be a supportive female friend to those who need one, but sadly I can't offer that, as my various illnesses/conditions mean that I am very unreliable, and reliability is the one constant that I think is necessary to be of any use to anyone else. So my heart goes out to anyone who needs that female support, and I hope that you can all build a good network of such, in the years to come.