Sister issues

[Val1985]

Hello, feeling pretty down about the relationship I have with my sister and how it's impacting other relationships.
I've always wanted to be close to my sister, since we were tiny, but I never remember it being reciprocated. There's only 3 years between us, so not a big age gap, but we've never had that close bonded sister relationship I see others have.
About a year ago she moved home to the town were from. I thought given were both in our 30s now it might mean we could be friends. I feel I have tried, but she's not going for it. I don't really hear from her unless I contact her first. She doesn't call to my house. I try and call to her and she's always busy. I have two little girls and I dread to think they will be like this when they grow up. It would break my heart.
She recently got married and I was one of her bridesmaids. There were a few things coming up to the wedding that massively effected me. So for her hen I wanted it to be really special, I worked so hard to make it perfect. She literally had zero interest in hanging out with me. Her friends were also just like her in personality, and very standoff ish. I was so stressed after the first night I had a panic attack when I went to bed. I honestly felt I was just there as the staff.
Also, I won't specify the event, but there was an afternoon where all 4 bridesmaids were together for something and after they all went for drinks and I wasn't invited along. One of the other bridesmaids organised it but I felt so embarrassed and rejected. I don't think I've ever felt so small.
Now the really crappy part is my mum is very much on my sisters side. She thinks I'm too sensitive and make too much of things. My sister has always been the favourite, which doesn't really bother me, but I'm now suppose to ignore or not mention at all of I'm upset. My mother is close to my kids, and I was close to her, but I feel incredibly let down. I struggled hugely with PPA last year and I think this has had an impact and made me doubt myself.
I'm so lucky in lots of ways. I have a great husband, 2 kids that I adore and some great friends. I just wish I could have a better bond with my only sibling. I'm so jealous of my friends relationships with their sisters!!!
Don't know what I really want from this, just wanted to vent.

Is she the older?

I think sometimes younger sisters can get trapped in a childhood role where they desperately want the older sister to like them and the older sister thinks the younger sister is a kid and sort of looks over her head. (I’m a younger)

Nope. I'm actually the older one. She is much more extroverted than me though. I suppose my mum has 5 sisters and is so close to all of them, and I grew up seeing that and hoped for the same.

Why do you want to be close to her? Do you have anything in common? Would you be friends if you met outside of the family situation?

The sisters as best friends thing is a little Disney for me. Im not close to mine at all, it took me a long time to realise it was mostly me pushing for a relationship - as soon as I stopped? I haven’t heard from them in months, now years, other than my mums WhatsApp chat occasionally. They’re like distant cousins tbh.

you can’t force a relationship that isn’t there

I'm not close to my DSis at all . Being slightly concerned about that, I have particularly noticed how many others are the same .The ones who are close are really fortunate, and I do envy them, but there's no point trying to make something that isn't there . Accept it and move on . So many others have had to do the same !

I have two sisters and I’m not close to either and manage perfectly well. Just because you grew up together doesn’t mean you can be good friends. I have five close friends and a wonderful daughter. That’s enough for me.