Socially dysfunctional or mentally ill? My mind vacillates over the answer.

I wonder how much other posters think they overlap and differ. Is my social dysfunction the result of long term mental health issues or the psychiatric symptoms an effect of reactions to long term social dysfunction?

In my case i would veer towards the latter choice as i have had social interaction difficulties from a very young(pre teen) age but it was not until i was badly teased(as a teenager)for my physical and social awkwardness that overt mental symptoms really developed.
The only thing that makes me question that is the weird thoughts i got which the injections all but stop. I can't connect that to the teasing whereas i can the anxiety/paranoia/social anxiety/depression/low self esteem/worth .