I don't have friends or family, let alone a relationship.
Don't you want people to do things with?
No, I like to experience new things on my own, and I'm not lonely at all.
It's good that you can enjoy time to yourself, but always being isolated and having nobody to talk to can greatly impact your mental health. Having just one other person who you can talk to about your day or issues you are having can have a huge positive effect on your life.
It's not hard at all.
Maybe you can't see what is going on in your life but humans are social creatures . If you feel like you are isolating to protect your self please seek help.