How can your faith become stronger? First, be sure your commitment to Christ. Have you acknowledged your sins to God, and put your faith and trust in Jesus Christ as your Savior and Lord?
Second, build your faith on the truths of God's Word. The Bible is spiritual "food" given to us by God to strengthen our faith. In it, we learn of God's love for us, and also how He wants us to live.
Finally, draw strength form other believers. Often I go to our prayer meeting on Tuesday or Saturday feeling weak and after the time with others in prayer my faith is strengthen. Every believer needs to be in worship and prayer with his/her fellow believers.
"I pray that out of his glorious riches he may strengthen you." Ephesians 3:16