I'm afraid of becoming complacent and I'm afraid I'll never be happy
Are you sure you might not ever become happy?
Yes it's impossible to be happy when I've seen this in my family, friends and other people all my life.
You shouldn't live your life in fear. Instead focus on what you can do to be happy and not let your family members negatively impact your goals.
I think happiness will come when I accumulate enough money.
Money doesn't bring people happiness, I think it creates more loneliness. It's wrong to live your life in fear. You need to get out there more and work on yourself.