Drugs won't help with this problem.
Like you, as a kid I felt devoid of any real personality or something like that. I think for a while I was, I was just taking it all in and processing, but nothing came out. What the real problem seemed to be was that I was too disconnected - I didn't watch the same things other people did, didn't know what they were talking about, didn't share the same passions, didn't attend the same events... so there was never anything to talk about. It became a case of deciding what sort of person I was going to be and having to use that as a guide. Not sure if I turned out exactly that way, but it helped. It helps to have role models, people to study. It helps to just be involved because you have a connection point to begin an interaction with, and something to bond over. Guys typically bond over things they have done together or interests they share. If you don't do much, there's not much of an anchor there.
More experience with more people will make interactions easier. Until they just become routine. Even boring. You might find yourself the life and soul of a party in the end if you overcome your confidence issues. Fortunately confidence is something you can get just by doing enough.
You do have to try to be the sort of person you want to be. Doesn't materialize on its own. You have to want it, and do it. Do it for long enough and with conviction and it will become incorporated into yourself, into your personality.