I agree with florica. I'm a dyed in the wool introvert and have been most of my life. I can put on a good show when I have to but I don't enjoy it, at work, out with people socially, or anywhere else. The fact that you crave to be back where you were shows that you haven't really changed that much.
Some meds have side effects and every med works differently on different people. You never said what kind of meds you're on, but one of them may be affecting your thoughts and speech. You seem really erudite and articulate here. Much so more than me.
Maybe ask your doctor about side effects from your meds.