Do you have trouble making friends as you age?

Do you find that as you get older it's harder to make friends?
I personally have outgrown my high school & post-secondary friends. But in my late 30's I find it's difficult to find genuine people to keep as friends. My workplace feels like high school with cliques all over the place. Sometimes there are some people who seem cool but we don't keep in contact. Just come to work, do our job, chit chat and that's about it.
Do you have trouble making friends as you age?
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