What's the likelihood my kids will get on as teens?

[Whatarewedoing]

My boys are currently 10 and 7 and have always gotten on well. They really miss each other on days one has a play date away and play amazingly together. They even sleep in each other's bed. DS10 is not bossy and still very playful and DS7 really looks up to him but also feels like an equal. I know we are incredibly lucky as I know a fair few sibling rivalaries that are driving kids and parents mad. I am a worrier and as DS10 is about to go to secondary school in September I wonder if my bubble is likely to burst? If your kids got on really well during childhood - did that change during teen years and did change to seconday school for the older one have anything to do with it?

My boys have a 2 year gap (3 school years) and still get on ok at 14 and 16. They bicker sometimes but can socialise and play sport together. Eldest had friends round last week and youngest joined in. It helps that youngest is tall and fairly mature.

Mine have a two year gap. They were absolute best friends from the start. DS1 reached puberty age 11 and DS2 was a little late at 15 so there was a period of 4 years when they didn't have so much in common as the age and maturity difference made them have different interests. They still got on, just didn't do so much together. The gap closed and now as adults in their 20s they get on well.

So it wasn't secondary school that made the difference so much as adolescence.

My DDs are 26 months apart, and were besties throughout childhood. Now they are early 20s and still really close.

Their friendship groups didn't really mix during their teens (when the age gap seemed biggest) and they didn't really associate at school, but this has relaxed a lot - DD2 will happily go to the pub with DD1 and her friends, and vice versa. And the distance grew a little during the uni years.

There are 18 months between DD and DS. Like glue from day one and now, aged 20 and 18 they are still best friends.

Dd has a long term boyfriend and a small group of friends, DS has had a couple of casual girlfriends and has a a more solid group of friends, but they still spend loads of time together. visit each other at their different Universities and have spent Christmas at home hanging out a fair bit. I don’t know if they will always be this close but I can’t see them ever not being very present in each others lives. yes, they squabble occasionally but they are each others biggest champions. it’s lovely.