@SummerBlondey
I do have a best friend who I trust with my life : my adult daughter. And one day you will have that also.
What a lovely thing to say. 
And I know what you mean. I have this also... A wonderful relationship with an amazing adult daughter who I adore.
Like you, I also had friends in the past who turned out to be flakey and useless (none went after my DH thankfully!) But they weren't great.
I have several friends who I can depend on now, but went a few years (maybe a decade) with no friends. I had 2 who I knew from childhood who lived 50 and 100 miles away, but they were too distant to help, (and worked full time.)
So although we messaged and wrote to each other quite a bit, and met up 3-4 times a year, I had no friends to depend on who were closeby, and very little family.
My neighbours were very insular too, and rarely spoke, and I never fit it with the school mums, OR the cliques at work, (where I was part-time,) as I was shy and fairly quiet. It's hard but it does pass, and things do get better. 
I have these 2 long-time friends still, and I have a good friend who is in my village, (I met her when I moved here nearly a decade back,) and I have several neighbours who I can depend on in an emergency, who I class as friends too. Not super close, but still friends, as I know they'd help me if I needed it, and I would help them. In addition, we have a chat when we see each other, and also give each other a Christmas card and small gift, and I see them at the village pub a couple of times a month when me and DH go. (pre covid obvs!!)
As I said, things can and WILL get better.