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.

Have you considered volunteering? It’s a great way to not only help others in need, but to feel good about yourself in doing so. As an introvert, it may be intimidating to put yourself out there in this way, but there are volunteer opportunities of all kinds that may not require intense social engagement but still expose you to some people and that purpose you are searching for.

Also, you don’t mention what kind of chronic disease you have (and by no means do you need to disclose this), but there may be opportunities to network with others who have the same disease (message boards, support groups, etc.) Perhaps speaking to others who have thrived despite the disease could be inspirational to you.

More than anything, I’d encourage you to be kind to yourself during this time. Ending a long-term relationship is a grieving process of sorts. It’s natural to feel down as you adjust to life without your partner. Even if you had an active social life, I suspect you’d still feel a sense of loneliness to some degree. You will get through it. Do things for yourself that make you feel good. You deserve it.

Best wishes to you.