Your heart proves that you can be a fitness instructor who can support your family and enrich your life, so that your parents don't have to worry about your life and your girlfriend doesn't have to worry about his future happiness. On the other hand, your parents and your girlfriend are right. They want you to live a good life without running around for a living. Of course, they also want you to have a decent job, otherwise people will put pressure on your parents if they ask.