I am lonely

I am 28 and have been in a relationship for 5 years. I have a boyfriend, parents, sisters, and a pet cat. I have friends, some friends I only see monthly others I see weekly. I am also part of a few social groups a few times a month. Yet every day I am lonely. <br><br>I do not know what I should do. I do not know if it is possible to get rid of this feeling.