For me, friendships are essential. to expect my partner and DC to meet all my needs is too much.
But I'm wondering if you have a skewed view of friendships. Have you heard the saying, "Friends for a reason, a season and a lifetime"?
I think it's a really helpful way of looking at friendships. Not all friendships have to be the kind that will last forever, with people you'd call at 3 am to help you bury the body. Lots of friendships are less intense.
I have close friends who are my 100% to-go people, some of whom I see often, some I don't, but all are in semi-regular contact. (lifetime)
I have close friends I almost never see or speak to but when we do get together it's like no time has passed and any one of them could ring me up and ask for a favour at any time (and vice versa) and i wouldn't blink. (also lifetime, but different)
I have lots of season friends too. Ones who are currently in the same "boat" as me - mum friends often fall into this category. We get on well, we have fun, we support each other - practically and emotionally. But I'm not fully up to speed on the intricacies of their family lives, I wouldn't just let myself into their house when I know they're sick etc.
And then reason friends tend to be people you share things with like a hobby, or work or whatever. These are great friends too, but they're not the ones you ask to pick your sick child up from school, nor are they the ones you call when your mum dies.