The speaker describes a painful distance inside a family. These are people who should know each other well, yet the speaker feels they no longer do. Nobody listens, nobody really talks, and any attempt to connect slides into an argument. That sense of being misunderstood, of being assumed to be known when you aren't, runs through the opening lines.
The poem turns more bitter near the end. The speaker asks what the point of apologizing is, and the short lines "It doesn't last forever / Grudges do" land like a verdict: forgiveness fades, resentment sticks. The final lines admit something honest and uncomfortable. The speaker may say "I forgive" but doesn't mean it, because the hurt can't be forgotten.
The mood is tired, hurt, and a little hopeless. The plain, unpolished language makes it feel like someone venting something they've carried for a long time.