It sucks, but there’s unfortunately no written rule book that says she has to be any different. Your son sounds like he’d be better off with his own friends, and you as well. Your sister sounds like she’s got a pretty good handle on how she wants her life to appear – I’d explain to her how her behavior makes you feel and then just at that point let it go and just focus on your kids, your life, your relationship with your friends and try not to take it personal. Your baby doesn’t need to be friends with his cousin if he isn’t going to be nice to him.
If she doesn’t want to be close to you guys she doesn’t have to. There’s a reason behind her not wanting you and your child around her and her son. And your son n your nephew are cousins not your sons nephew… you should ask why and tell her you want the truth. I know I don’t want my sister around my sister whatsoever under any circumstances 
There’s no rule she has to. I can’t tell you why as I don’t know her or you. She doesn’t even need a reason. Sounds like she may have plenty with her friends in her life. I know I don’t like too many people in my life and I have 2 full brothers and 3 half brothers that I don’t talk to. Not because there’s anything between us but because we just don’t, we have our lives. I don’t ask them why we don’t talk or get together. I still love them. It just is what it is.
I can understand how you feel like something is missing and im sorry for that.My sister and I didn’t have that closeness either and I yearned for it.I think you need to have a conversation with her so you can understand why she pushes you away. Unfortunately not everyone’s idea of family will be the same as yours and it stings to realize that.
Eh. Just because y’all are sisters doesn’t mean she’s obligated to associate with you or be close to you. I’d just leave it be. You stated her son isn’t so nice to yours, so maybe it’s for the best
My brother is the same way no kids but is always distant. So I stay away from him. He’s the one missing out on his awesome sister and nephews his loss not mine
Don’t beg no one for a relationship live your life with your kids​:heart:
Sounds like both you and your son are better off without them.
I’ve been told I’m the glue, so I might have some insight.
All my siblings talk to me and hang out with me separately, but a couple of them are not close to each other at all.
One of my siblings can only tolerate the other in small quantities. Their personalities clash.
Another has a different way of thinking. While thats fine, the other sibling refuses to stop criticizing said actions.
It could just be because she doesn’t want to be close?
Out of my 5 sibling including me would be 6 of us. I only talk to 1sister regularly and occasionally my oldest brother I have my reasons 
just because you share blood doesn’t mean you will get along or enjoy their company. Sounds like it’s all one sided with you being the one to call or set visits… for your sanity and heart stop doing this she doesn’t want a relationship. There’s nothing wrong with wanting to be close to family but it’s gotta be a give and take. You and your son are better off without that stress in all seriousness.
I had a sister just like this. I just stopped trying
It sounds like she doesn’t like you very much. Blood relation doesn’t equal forever friends. Nobody ever has to have a relationship with anybody they don’t want to. I’d say cut your loses and move on.
Being sisters definitely doesn’t mean you have to be best pals. My two older sisters and I talk like maybe five times a year. We just don’t click as friends and don’t have anything in common. We love each other and hang out at family events with our kids but we have our own lives and friends our kids get along but they don’t hang out outside of like thanksgiving and family get togethers and they don’t ever talk outside of those events.
I know how you feel though. For years I tried to be close with my sisters and tried to force a relationship. You may have to let her go as a friend and just accept that she is your sister only. Doesn’t mean you don’t love each other
Just because you’re siblings that doesn’t mean you have to like each other or be close
If you really wanted to know the answer you wouldn’t settle with her ignoring you, that or you haven’t asked her when the time was appropriate.
I would try again, face to face and tell her you genuinely want to know. If she doesn’t provide you with any answer that could possible offer a resolution between the two of you, then it’s probably time to find a friend of your own that you can be close with as well as your son and just be cordial during family festivities as they come about.
She’s not obligated at all to you and your kid🤷🏾‍♀️. My sister is a freekin horrible person, so I keep myself and my kids away from her. I’m sure she has her reasons
You say your 5 year old son loves his nephew, do you mean his cousin, I’m confused…
Maybe shes gay and that friend is her lesbian lover and shes just scared to come out to u so she distanced herself from u instead
Write a messaged over fb explaining how you feel.Some people clam up when confronted verbally, and written conversation is easier.
Sounds like she’s not interested, stop trying am afraid 
it’s really sad but if she’s being like that, u cannot force a relationship x