I understand how your insides feel like they are burning up with a sense of anger and hurt when someone you care about says something so insensitive and hurtful. However, if your friend knew what you were going through then im sure they wouldn't say such things. A lot of people know very little about certain things and will never learn as they wont have the need to untill/unless it comes into their life. Talk to your friend, open up, give them resources where they can read and learn in their own time.
Please be honest. It is unhelpful to your illness and your recovery/maintenance of being well to keep things hidden. With mental illness, you need plenty of love, support and care from people so please don't miss out on what could be a real source of comfort to you.