It's always wrong to pretend we're something that we really aren't; when we do that, we're actually telling a lie. Even if people believe us at first, eventually they'll discover we weren't telling the truth. The Bible says it is "better to be poor than a liar" (Proverbs 19:22).
The key is for you to realize that everything you have has come from God, and He alone deserves the credit for whatever you've been able to accomplish. After all, He gave your abilities to you, and He also gave you the opportunity to be successful. Even the ability to work hard and overcome obstacles has come from Him. This is why the Bible says, "Do not think of yourself more highly than you ought, but rather think of yourself with sober judgment" (Romans 12:3).
Be thankful to God for what He's given you -- and let others know you see it solely as a gift from His hands. In addition, ask God to help you use your resources wisely -- not to impress others, but to support God's work and help those in need. The Bible says, "If anyone has material possessions and sees his brother in need but has no pity on him, how can the love of God be in him?" (1 John 3:17).
Most of all, make it your goal to be rich in your spirit. Is Jesus Christ first in your life -- or is He only a casual visitor? Are you spending time with Him every day through prayer and the Bible? Make Christ your priority -- beginning today.