Friendships can die?

So we all make friends. We do. All of us,we all make friends. And most of the time we think that they are going to last forever.
In grade school many of us had that friend we went through every grade with. We hung out during the summer with and shared our weird childhood crushes with. Then in middle school it changes and suddenly you aren't with that friend but you make others.
But honestly that is just a warm up to the perils and joys of friendship as an adult. When we are kids our fears and worries are not nearly as frightening and life altering as an adults. And trust me sometimes you need a friend, you need that person who you caan lean on for a little while and they will bring you chocolate and say it's okay.
But in the adult world friendships can die. They die and fade away and you are left mourning a special closeness that you had that is suddenly gone. Sometimes its a sudden death and other times its a slow progressive leaving and one day you wake up and that person is missing.
I watched and am still mourning the deaths of several friendships, that honestly I have to say make me question whether or not I am even worth being liked. I had a lot of friends up till 4 years ago. Huge life changes came to my life, I mean huge change everything type. As my husband retired from the Airforce the economy tanked and I was forced to abandon plans to go to graduate school in order to get a job to support us. My eldest daughter became pregnant and the bio dad would not relinquish rights and neither one wanted to take care of the child so my husband and I became parents again in our 40's. One by one friends just drifted away or stopped talking to us all together.  One person told me that since I had a young child and she hates kids there was no way she could see us being friends again. Others didn't care to talk or whatever it's like suddenly I wasn't good enough for them. I wasn't worth calling and saying hi to. I wasn't worth going shopping with on a Saturday. I wasn't of use anymore.
So here I am, alone and my only friends are with people I know electronically througn a weight loss support app. I know what they look like, I know their names but really its not the same as a flesh and blood friend. I don't go to movie unless it's either with my husband or adult son, or occasionally by myself. I haven't done what is known as a girls night or weekend in years. Honestly anymore I have to wonder if it is even worth the pain of trying to make new friends, cause I'm , sure with my track record that the chances are small.
Like I said I am still mourning for what I used to have,not sure how to move forwards.