Hi Jdl,
I apologise I don't have much time online. My reply is not intended to sound peremptory, but I'm writing fast and hope you will discern I have no condemnation in my heart towards your predicament, but rather, I know that if you are determined to find God again and meet with Him, He is watching and waiting until He hears your heart cry out to [u]Him[/u].
I've read this whole thread, and I know all the answers bring something of the truth of God's existence and the testimony of scripture to that truth, but, I think you are making one of the mistakes Bible4life has tended towards, which is to be far too ready to base your 'faith' on what you think you feel, or what you think you might know in your mind.
God is far simpler than this, and the apostle Paul explains God's viewpoint ruthlessly. (I don't mean God is ruthless! But He is in some ways. He cannot tolerate sin in His presence, and He will not make allowances for anyone who knew the truth, but decided not to acknowledge it properly. Let me explain...)
You are in a worship system. Either you put your trust in idols, or you put your trust in God. (John 4:21, 22, 23, 24) Note: 'you know not what you worship'. Compare this with the scathing condemnation in the Old Testament which God through the prophets made of handmade gods.
Today, we also must rule out self-worship - whether it be the gratification of the flesh, the mind, or thinking that by our minds we can judge whether God's thoughts are believable or not. We MUST bow our minds to Him. That's not faith. That's worship. God is pleased with this.
This is not the same as whether or not we have 'understanding'. It is plain from Proverbs (read the early chapters), that God puts great store on 'understanding' and 'wisdom'. However, He is not talking about the understanding available to us through the fallen mind, or the wisdom of the world (1 Cor 1:20 - end of chapter), but of the understanding and wisdom which we develop as our minds are renewed through the operation of the Holy Spirit as we obey God's word. There is no way to succeed in this, apart from to admit defeat from a natural point of view, and acquiesce to the operation of the death of Christ which is spoken of in Rom 5, 6, which puts an end to the wretchedness in Rom 7 leads to the overcoming life of Rom 8.
Now, in Rom 10, Paul points out that 'faith comes by hearing, and hearing by the word of God'. The practical application of this, is that you must seek God until [b]you[/b] have [b]heard Him speak[/b] to you, or, you must trust the testimony of the millions of Christians before you, that the written word of God is true, and start holding God to His word by trusting He is faithful who promised, who also will do it (Heb 10:23).
Going back to Rom 1, as Compton and MaryJane recommended, the 'choice' you have is not whether to believe or not to believe, but whether to glorify God as Creator, or worship the created thing (creature) instead (v 25).
Here is Paul's [i]logical[/i] explanation of God's behaviour, in response to man's response to His pre-existing statement of His existence and presence: 18 For the wrath of God is revealed from heaven against all [u]un[/u]godliness and [u]un[/u]righteousness of men, [u]who hold the truth in unrighteousness[/u]; 19 [b]Because that which may be known of God is manifest in them[/b]; [u]for [b]God[/b] hath shewed [it] unto them[/u]. 20 [b]For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made[/b], [even] [b]his eternal power and Godhead; so that they are without excuse[/b]: 21 [b]Because that, when they knew God, they glorified [/b][him] [b]not as God, neither were thankful[/b]; but became vain in their imaginations, and their foolish heart was darkened. 22 Professing themselves to be wise, they became fools,
So we see that that you must make the CHOICE to GLORIFY GOD, in order that He shed light in your mind. Otherwise, He will let your mind become dark and foolishness will set in, with His permission.
25 Who changed the truth of God into a lie, and worshipped and served the creature more than the Creator, who is blessed for ever. Amen. 26 [b]For this cause God gave them up[/b] unto vile affections
Repentance, in this case, means going back towards the time when you acknowledged God as you ought, and you glorified Him as you ought, and you withheld your mind and body from wilful sin - which includes not believing in Jesus Christ whom He has sent (John 16:9).
Please try to see 'unbelief' as a luxury you cannot afford, and with the same enthusiasm you have opened the door to it, now, work at closing the door, and keep leaning on it as hard as you can to [u]keep[/u] it shut!
I have one last verse to share, because I also had trouble with faith (as you may have seen in my replies to Bible4life), until 1) I asked God for a gift of faith, and graciously He gave me some, and 2) I heard the 'Have faith in God.' of Mark 11:22 expounded as 'Hold the faithfulness of God'. Somehow, that change of wording enabled my mind to give up all its trying, and rest in the faithfulness of God to do me good. And He has. All praise to His Name!