It is tough coming out of a long term relationship being an introvert. It is so easy to just hide away and forget about the world, but obviously you don’t want to do that because of your post. Many introverts have a creative, artistic side to them. Have you tried getting involved in some sort of art (creative writing, poetry, drawing, painting, etc…?) Sometimes the worst thing you can do is be alone, even if it just means going down to a local cafe and reading a book or being on the computer or people watching just to get out. I have found being in nature is good it has made me realize so much about myself, being an introvert I can sit and watch nature alone all day given the opportunity and never feel lonely. You don’t have to be an extrovert, just be yourself and find that which makes you happy.