In most situations I keep to myself. This is not to say that I deliberately ignore others - unless they have been awful to me - but I just dislike conversations in general, because the majority of them seem false or forced, and what is the point in talking to someone who is not really interested in your welfare? I do (and can) talk if it is really needed, but I try to keep it basic and friendly. There was a period in my life around 10 years ago when I found a small group who I had a connection to, and I did open up to them more than I do with most other people. Though they are since lone gone, so I have reverted back to how I was in my earlier teenage years.
I know society considers "loners" as losers but I don't care since I don't want to associate with harmful people
I never really understood this view. Society dictates that relationships are not mandatory; even somebody in a street is not
required to hold a simple conversation with you. Because of this we also have it dictated to us that we
must learn to accept rejection from other people. While holding this view society, or rather the majority of people within it, will simultaneously shame a person for being a so-called "loner", as you have put it. Why? This is unfair. Do people who prefer their own company not have the same boundaries as everybody else?
If a person or a group attacks you simply for wanting to be alone then there is a chance that they never liked, or cared about you in the first place. If you try to be more outgoing with them they would find some other characteristic in you that they dislike instead, because they were never a good "fit" for you to begin with. They want your attention; not your friendship.