Hi Op
You had a difficult childhood, seeing your siblings being able to be much more part of your mother's life,
You were just on the other hand had to fit in around your mother's needs when she felt up to this, even so, it was on a regular basis,
so you had whatever was left of your mother's time and energy after her looking after your siblings,
No wonder you craved your mother's attention ect,
as you had a real limit/ how much precious time you could spend with her,
It's quite Common and understandable/and natural you feel some regret,
It is what it is, you did your best under extremely trying circumstances,
You were there for her when she really needed it, matters most , and she knew that,
You had some good times with your mother,
Don't beat yourself up about it,
Nobody is perfect
You were and allways by sounds of it were good enough
All children/teenagers ect go through times when they can be demanding, it's part of just growing up,
The issue was you were with such low self esteem cause your mother seemed to not have enough time for you, whilst you were growing up,
Plus you were not allowed to be your own person with your own opinions ect with your mother,
You allways had to put your emotional needs to one side/or back burner your emotional needs in favour of pleasing your mother's,
This is obviously not healthy,for you constantly walking on egg shells, Wary of not trying to stress your mother, put pressure on her in any way,
Which in reality, you were probably just being a normal child, who was just reflecting the unstability/maybe Chaos, of your stage of life at that time
It sounds like could have had sever mental health issues
Basically you had to grow up far too fast,
You couldn't rely on your mother looking out for you, being there for you,
Essentially, having a mother like your type of mother was like to you /, or primary care figure constantly blowing hot and cold, you never know where you are emotionally with someone like that,
Making you feel out of balanced, not knowing of feeling sense of security
It sounds like it was more like a friendship, like you would have at school,
than a mother and daughter relantship,
It sounds like to me, it was type of relationship in which you were there, expected to be fun company, but not allowed to have a range of emotions,
Like weirdly she expected to be like one dimensional like a robot 🤖,
Where as she was allowed to have a range of feelings,
Your mother sounds like she quite selfish and very Needy childlike and couldn't handle being a grown up, expections,
Did she have you when she was very young such as a teenager or very early twenties ?