I know many people who are afraid to be alone and they try to replace this fear with pointless activities.
One advantage of being an adult is that you can handle anything. There are specialists like psychologies who can help you. You just need to be strong enough and ask for help.
Unfortunately, if your friends and relatives have the same challenge, you might consider this to be normal.
And in a way, loneliness is normal, but not being comfortable with it will surely cause you more troubles in the long term.