I don't classify myself as a loner. I don't avoid human interaction nor do I actively dislike it.
I do however spend a lot of time by myself and I prefer time spent by myself than in large groups of people. I live alone and I love it. I would call myself an introvert.
I don't think I interact any more or less with other people now that I have quit drinking but the quality of my interaction with others is better now. So is the quality of time spent by myself, come to think of it!