I could not "going" - What this small sentence means?

Question

Earlier sentences for context:

I felt lonely.

I felt sad

I could not get "going".

Answer 1

It means that the author couldn't get themselves in the frame of mind to do the things which need to be done for the day. This is often true of people who feel lonely and sad, because they are frequently depressed. Sometimes symptoms like these are simply transient and don't mean anything serious is wrong. But such people should be watched to make sure they snap out of their "funk." Extended periods of these sorts of behavior should send out alarm signals that something serious could be amiss and prompt intervention by family and friends. Depression is a serious illness and should be taken very seriously by the friends and loved ones of any individual who is affected by it.

Depression seems to usually have its roots in organic, rather than psychological causes, although psychological factors can play a role in exacerbating the symptoms of depression and can increase a depressed individual's feelings of sadness, loneliness and desperation.

Answer 2

It means one can't get motivated to go through the day with any energy or happiness. This person would rather stay in bed with the covers up, or vegetate in a chair before the television. Doesn't want to go to work, shop or take care of the simplest things. Lacking energy, motivation.

Answer 3

It usually implies a lack of energy or motivation:
"I just couldn't get going this morning."