And you realize what a fool you have been. Turn to God and ask Him to save you. Tell Him how you have messed up your life and the lives of others, and ask His forgiveness. Give yourself to His will, His direction, and quit trying to run your own life. Don't worry about how you feel or should feel.
Different people feel differently.
Some people talk about receiving Christ, others about giving yourself to Jesus. Both are right. Being aware of your salvation means being aware and responsive to your relationship with Christ in an emotionally binding and immanently satisfying way. Its a matter of turning to Christ in the midst of your day and thanking Him, or asking Him for help, or just sharing your feelings with Him. However you describe it, it involves an ongoing conversation with the Lord of Glory on a regular basis.