I don't get envious of other's happiness but I do get wistful over other people's "normal lives". I know somebody will say what is normal but you know what I mean. The kind of life I would be living if I wasn't mentally ill. I have an immediate family member, female, close in age to me who does not have mental illness and the difference is huge.
I'm sorry you're having a tough time. I hope you feel better soon.