I’ve never found it easy to make friends, at any age. I had a “best” friend but we drifted apart and she went radio silent after my birthday. I’d got to the point where I felt uncomfortable being with her as well, as we mostly ended up watching videos on her phone/tv and it was hard to make conversation or encourage her to do anything more interactive.
Reading some of these posts does give me some encouragement to try again, not with her, but in general.