Every day you have activities of daily living that you perform. Attention is given to various grooming and hygiene tasks; meals are prepared, laundry is done, the house is cleaned and whatever else comes up in the daily process.
When you experience a death of someone close, this daily routine, though still necessary, is shaken up a bit. With your focus so taken by the death and all that goes with it, this routine somehow manages to be addressed.
A death occurs. Initially, there is shock and a range of emotions and adjustments to contend with that may render you less than able to deal with the daily routine. This is a temporary situation and is expected and accepted.
After the initial loss of a loved one, if you are able to take care of your activities of daily living and function in a normal fashion, your grief is not a problem.
Your grief is personal. Grief enters your life, takes on various expressions during the process, and eventually finds a comfortable place to reside in your life. You will always miss your loved one and to that extent, you will grieve.