Is it pathetic to eat dinner alone every night?

There's absolutely nothing pathetic about eating alone. Many people eat solo by choice because they enjoy the peace, can eat what they want, and don't have to coordinate with others. If you're eating alone because you lack social connections and it bothers you, that's a different issue that can be addressed by gradually building Interpersonal relationship. In the meantime, try to make solo meals enjoyable - cook something you love, eat somewhere pleasant, or use the time for activities you enjoy like reading or listening to podcasts.