"Little Fights"

Well my boyfriend and I were starting to have our little fights. Fights about small things. Sometimes I'm asking my self why was he acting that way? Maybe he was influenced by our childish guy friend. Actually I don't like that kind. But I do really love him that's why I'm accepting it. But sometimes it annoys me already. I don't know what to do. We act like we're kids but we do still understand each other.