I am not emotional and did not cry when I became a Christian. Am I saved?
Think of the birth of a baby. Some fathers jump for joy at the sight of their newborn, some weep with pride, others pass out. Would anyone say that the only father who loves his new baby is the one who cried? Of course not. Every person has a different make-up with different ways of approaching a given situation. Some people are excitable; some are emotional; and some are clinical.
"For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life" (Jn. 3:16). It is clear that whoever believes in Him will have eternal life. There is no Scripture that says that a requirement for salvation is tears. If, in faith, you turned to the Lord in repentance of your sins, you are saved.
If you are concerned about your lack of emotional response, you can pray that the Lord will begin to chip away at whatever walls you have built around yourself that keep you from letting go, at times. He wants to heal you from the inside out. Once He breaks down the walls in your life you will feel free to express yourself more openly.