I think activities that drain you is using electronics all day long. It can seem that your energized but it actually drains ur power when u look at the screen all day. Try getting up more everytime you want to sit on electronics. Just control urself and never give up! Have an amazing day :)
It is easy for a person to be hard hearted because most of the time human beings approach things defensively, the main reason is they are trying to protect themselves psychologically from getting heart. This makes us so receptive to people or things that we are familiar with as opposed to those things we aren't familiar with.