The speaker addresses loneliness as if it were a loyal friend who has travelled beside them for years. Together they have moved across the country, seen exciting things, and done things that touched other people. The tone starts out warm, even grateful, calling loneliness "faithful" and admitting it has always been there.
Then the poem turns. The speaker says it's time for loneliness to leave, because they want to experience everything as new. There's no bitterness in this. The speaker says they did find something in loneliness, but it wasn't what they had hoped for. The final "the end" feels like a door quietly closing.
The mood is calm, a little wistful, and quietly hopeful. It reads like a farewell to a long habit, with the speaker ready to try life differently. The slightly awkward English gives it a plain, sincere voice.