Will a person go crazy if they choose isolation and hermit lifestyle?

I haven't been in a relationship in over 8 years and have no desire to even try anymore. I am in my 40s and stopped trying to please people because I have been stabbed in the back everytime. NOW, I am living in basically isolation. I work alone, I eat alone, I do almost everything alone. I don't go anywhere. I just sit home and get on internet or watch movies or mow my lawn. Am I destined to go insane or will I get so use to it that anything outside this will be scary and foreign and uninvitable?