["I told my mom that I didin't want to be in compsci anymore, because I was really miserable. She said that I should do what makes me happy."]
That's good advice.  If you're not happy doing something you should spend time thinking about what you'd really like to be doing.
I told my mom that I didin't want to be in compsci anymore, because I was really miserable. She said that I should do what makes me happy.