It's easy to forget that there are many different experiences of loneliness.
There is a person who goes on dates, goes to parties and has friends at work, who hangs out with their "mates" from school but they are VERY lonely.
There is a person who lives alone, mostly talks to people online calls their folks every other month and maybe hangs out with their friend IRL 5 times a year. They are not lonely. They are worried you noticed this and are going to ... suggest things to them.