Whether it is social anxiety, or not knowing how to correctly read other people, there are ways that we can learn and push ourselves that can greatly benefit our interactions with other people. If we can improve these interactions, we can further our social life, our work life, and our relationships.
What you don't want to do is take it personally. It's easy to feel rejected, because that's what having another person show no interest in you feels like. But is that what actually happened? Can someone truly reject you if they haven't gotten to know you? And more importantly, if you know someone doesn't want to be friends with you, do you still want to be friends with them?
One of the basic wishes most parents share is that their children get along, play, and interact well with others. Most often, these social abilities develop intuitively. But for children who instead struggle with peers, the earlier interventions start, the earlier they catch up. Since both ADHD and autism impact relationships, sorting out the 'why' behind social difficulties is often a first step towards figuring out how to best support this vital area of development.