Faith is a gift from God to those who are baptized in the name of the Father, and in the name of Jesus Christ, and in the name of the Holy Spirit. You are baptized in the name of the Father when He chooses you to receive His grace. You are baptized in the name of Jesus Christ when you put your trust in His death for the forgiveness of sins. And you get baptized in the name of the Holy Spirit of God when the Holy Spirit enters your body and you are born again with a new heart filled with love for God and man. The Holy Spirit seals us as the elect of God, makes us part of Jesus' body , we become One with the Father and Son, opens our eyes to understanding scripture, and strengthens and guides our lives to do the Father's will. Faith is not just a mental thing. It is also an experience that can be felt through introspection of the mind and heart. You will notice the change in you and this change will confirm and strengthen your faith that all of this is real. I suggest praying to God thanking Him for His blessings and for help in strengthening your faith and in doing His will.