Whatever "faith" you're abandoning, it was not the real thing, the personal, loving, joyful fellowship with God that is the essence, the heart, of Christianity.
1 John 2:19
19 They went out from us, but they were not really of us; for if they had been of us, they would have remained with us; but they went out, so that it would be shown that they all are not of us.
Given the counterfeit nature of your "faith," it is no surprise that your departure from Christianity causes you a sense of relief. That sense of relief will give way - sooner or later - to the meaninglessness and death that God says in His word are the "rewards" of living in rebellion to Him.
Proverbs 1:28-33
28 Then shall they call upon me, but I will not answer; they shall seek me early, but they shall not find me:
29 For they hated knowledge, and did not choose the fear of the LORD:
30 They would none of my counsel: they despised all my reproof.
31 Therefore shall they eat of the fruit of their own way, and be filled with their own devices.
32 For the turning away of the simple shall slay them, and the prosperity of fools shall destroy them.
33 But whoso hearkens unto me shall dwell safely, and shall be quiet from fear of evil.
Proverbs 14:12
12 There is a way that seems right to a man, but its end is the way to death.
Romans 6:23
23 For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord.
Romans 2:5-10
5 But because of your hard and impenitent heart you are storing up wrath for yourself on the day of wrath when God’s righteous judgment will be revealed.
6 He will render to each one according to his works:
7 to those who by patience in well-doing seek for glory and honor and immortality, he will give eternal life;
8 but for those who are self-seeking and do not obey the truth, but obey unrighteousness, there will be wrath and fury.
9 There will be tribulation and distress for every human being who does evil, the Jew first and also the Greek,
10 but glory and honor and peace for everyone who does good, the Jew first and also the Greek.
The crazy thing is that none of this is necessary. God would much rather you truly knew Him and walked with Him in loving submission, as He created you to do. Because He loves you incredibly, He's bent over backwards to make a way for you to avoid the punishment your sin deserves and enjoy Him eternally instead. He offers us all love, and joy, and peace in Himself - if we'll take it - but will give us what we actually deserve - punishment and death - if we refuse His offer.
1 John 4:9-10
9 By this the love of God was manifested in us, that God has sent His only begotten Son into the world so that we might live through Him.
10 In this is love, not that we loved God, but that He loved us and sent His Son to be the propitiation for our sins.
John 1:10-12
10 He was in the world, and the world was made by him, and the world knew him not.
11 He came unto his own, and his own received him not.
12 But as many as received him, to them gave he power to become the sons of God, even to them who believe on his name: