People on the autism spectrum generally have little to no friends due to our brains being wired differently from that of a NT person. Thus, that leads to us having difficulty communicating with them. It does get easier as you get older, IF you put in the effort it takes to get there. It's not going to magically happen once you reach a certain age. I didn't have my first friendship until 6th grade, so I've been a loner most of my life. In 6th grade I had no idea whatsoever how to connect with people, and I was too afraid to even say so much as hi to someone. Now in 10th grade, I'd say my social skills are much better, but it took a lot of trial and error, embarrassing moments, and frustration to get even this far, and I still have quite a bit of trouble in certain social situations.