Nothing is more important for our spiritual growth than the Bible, and one of the best ways to discover it is to become involved in a group Bible study. May your prayer always be that of the psalmist: "Open my eyes that I may see wonderful things in your law" (Psalm 119:18).
I'm thankful you and your friend want to learn more about the Bible, and I hope you won't ever lose that desire. From what you say, however, this particular group seems to be going another direction, and you may need to explore other options. What they're doing isn't necessarily wrong, of course; the Bible tells us to "encourage one another daily" (Hebrews 3:13). But this shouldn't become a substitute for delving deeply into the Bible and applying its truths to our lives.
Don't hesitate to share your concern with the discussion leader; he or she may not even realize that the group has drifted from its original purpose. Ask God to guide you also, and help you find the spiritual nourishment you need. Your own church may have a Bible study that can meet your needs - and if it does not, you may want to encourage your pastor to start one.
In addition, set aside time each day to be alone with God - reading His Word, meditating on its truth, and praying. If Jesus took time to be alone with God each day, shouldn't we also?