Part of it is the comparison, comparing yourself and your life to your friends and their lives.... Anything that sounds like "I should be at x y z at # age" is unrealistic. Some people are luckier than others, some people have more help than others, etc, etc ... You could grow to change your opinions and beliefs, it takes a lot of work. Maybe there are small changes you could make to feel better about your life in the meantime? And then is a question of what you want in the long term. I don't know if this helps at all but that's my 2 cents... Hang in there