Dear Zombita,
Do you live with your family? If you do, they probably already sense something is wrong. If you are young (living with parent{s}), there are many possible reactions but the mostly likely one is that it will be a good thing to tell them. For instance, in my case, I can usually sense when something is amiss and I jump to the worst possible conclusions; therefore, I would be relieved. It can be really hard to ask for and accept help. Some parents might at first be in denial and therefore be sort of dismissive. Admittedly, it must be terribly hard for those who reach out and are dismissed but you still need to try. And sometimes someone might be in denial at first but later come around. If they care about you, I'm sure it will be good to tell them. Again, I have to constantly remind myself to ask for help. Most people want to be helpful. If you are married then being truthful and open is important for a healthy marriage. I find that the best time to talk to my husband is when we take our daily walks. There are no distractions. I know it's not easy.
Sincerely, Myst