In response to some comments on here, the OP said this is in his apartment building. Is it really so bad that kids talk to someone who lives in the same building in what I would assume is a reasonable building and not a slum in a ghetto with shootings every night or anything like that. Im in England and assume this is in America so a different country, but most places here kids being inside the building with the building doors locked wouldnt be such an issue.
There is another point I have though. Being a loner and not being comfortable in dealing ith people is often a sign of lack of confidence in yourself and an area that needs healing. In my younger days I was very much like this and found it difficult to talk to people I didnt know. I had a few friends and everyone else I knew tended to be through them. It was because I was brought up with 2 older brothers by my dad. My mum wanted to keep us but my dad said he'd kill her and us if she took us so she thought we would be better off being alive with him than dead. As you can tell already, my dad was not a nice man and was always violent towards me and one other brother (the oldest brother was his favourite and could do no wrong). My older brothers also used to beat me up. My dad was also verbally abusive telling me all the time that I was worthless and would never amount to anything, should never have been born and stuff like that, usually working himself into a rage so it became violent as well.
Over many years as a Christian, God has healed me, maybe not 100% yet as there are still some psychological scars there, but not far off. I can now speak to anyone with confidence and in my work, church and personal life have dealt with all levels up to chairmen of multi billion pound companies, top corporate lawyers, government officials, politicians, Lords and other aristocracy, etc and am also happy dealing with the other end of what society judges of people including many years of volunteer work with the homeless which includes a lot of people who are mentally ill.
It doesnt matter who I talk to now, I see everyone as, like me, a person. No more or no less. Maybe circumstances and genetics have enabled them to be lifted high in the world or be at the bottom of the pile. Gods love for them is no different so the way I treat them is no different. We are called to share Gods love and the gospel.
Being a loner does not do this, so I would recommend you pray for opportunities to share His word and His love. And also pray for peace in talking to people. Maybe start in your church. It will take pushing yourself to do something you may not want to, but God wants us to grow and live in the fullness of Christ. For me at least, being able to deal with other people is part of this.