I feel terrible that you feel that way.

Depression isn't something you need a reason to have. It is the same as diabetes or cancer. It strikes anyone indiscriminately and can be a physical issue (chemical imbalance, hormonal imbalance) or the result of trauma or many other reasons or combinations of many. You wouldn't say to someone who'd had a stroke that they should just get over it.

I agree with many other posters here that you should speak to your Dr, look at therapy and medication options and accept the help of your supportive family. My thoughts are with you and I wish you all the best.