How to make My Faith Stronger in God?

I am a Christian, but I can say that my belief in God is not strong enough. Because I can still be led by the temptations around me, sometimes I have doubts about my faith because of what I hear about other religions. I want to worship God and serve him. I want to know the Lord completely and be able to share his word with other people. Please pray and give me advice on how I can stay in the Lord so that I will not be taken by any temptation around me.