Does God really exist? How can you know?
The Evidence & Proof for God is clearly seen in the following; 
in Nature and in the Creation​ 
It is obvious to any honest mind or seeking person that someone had to create all this and us. Look at the trees, the animals, the plants, the planets, the stars and us. Look at the life cycle, the seasons, how the planets rotate around the sun. Look at how it rains or snows, rain turns into rivers, rivers go into the ocean; water evaporates forms clouds and it rains again....
Look at the order, how everything is arranged; that couldn't have happened by pure accident or solely by chance!​ No that is not possible!
Or look at the human bodies; how they work, how we grow and develop, how our bodies fight diseases, how it is all arranged.​
​For what can be known about God is plain to them, because God has shown it to them. For his invisible attributes, namely, his eternal power and divine nature, have been clearly perceived, ever since the creation of the world, in the things that have been made. So they are without excuse.                                                         Romans 1:19&20

                   There is a Creator!
Acknowledging that there has to be a Creator, a Higher Power, a supreme Being; that is the beginning, so don't stop there. If​ you conclude that there has to be a Creator, that automatically will lead you to the next questions;
         Who is he​ and what is he like?
How can I know him​ and how  can I get to know him? What is my relationship to our God and Creator? What has he made me for? What is my purpose? What is my end?
           The answers are available​!
For people who ask me; "How do you know that there is a God?" I have a simple answer; Ask him, I'm sure he is able to show you that he is real! I hope you are after the Truth and that you will not settle for anything less than the truth! Seek and you will find, that is God's promise and our God keeps all his promises! Unless you pursue answers you will end up settling for some unfulfilling routines, you may get trapped into all kinds of miseries and you may be in danger of wasting your life and not have the peace and confidence that is available from our Maker!

                      The Beginning
At first there was only God, his Son and the Holy Spirit! How do I know that?
When we read the creation account in Genesis we find this verse in Genesis 1:26  ​
​Then God said, “Let us make man in our image, after our likeness. 
So God created the Heavens and the earth and everything that is in them including us. And everything God created was good.
                    The World today
The world we live in today seems to be almost the opposite from the creation that we see in Genesis. What happened? What went wrong? Why did it go bad? Evolution would have us believe that man is evolving, getting better, more developed, smarter... but look at the world, look at the confusion, all the chaos and the continuing bad news we hear every day . Look at the never ending wars, the political back and forth and the descent into more and more perversion, violence and misery. Now a days black has become white and white has become black. Something went seriously wrong.
                   Back to Genesis;
What happened after God made man? God put Adam and Eve into the garden of Eden. Life was perfect and easy. Man walked in fellowship with God. God only gave  one command to Adam and Eve; Not to eat of the tree of the knowledge of good and evil. God told Adam that on the day they would eat of that fruit; they would surely die. (Genesis 2:17)​​​​ They could eat any fruit, except that one. Satan came in the form of a serpent and tempted the woman to eat of the forbidden fruit. Instead of obeying their Creator, Adam and Eve listened to the devil's lies and ate of the fruit of the tree of the knowledge of good and evil. And everything changed.....
The next time God walked in the Garden of Eden Adam and Eve hid from him. The result of Adam's and Eve's disobedience ​was that they became spiritually dead to God, they also had to leave the Garden of Eden and their life became hard and difficult. And sin and disobedience has gotten worse and worse in man since that time. Chaos started to reign. How did what Adam and Eve did affect us? This is what we read in Paul's epistle to the Romans about this;
Therefore, just as sin came into the world through one man (Adam), and death through sin, and so death spread to all men because all sinned. (Romans 5:12) Because of one man’s trespass, death reigned through that one man... (Romans 5:17) One trespass led to condemnation for all men... (Romans 5:18)                                              

        The problem and the Answer
I hope that you are able to see and admit that sin is our problem.
​For all have sinned and fall short of the glory of God.                                   Romans 3:23
​​Do you not know that if you present yourselves to anyone as obedient slaves, you are slaves of the one whom you obey, either of sin, which leads to death, ...     Romans 6:16
​For the wages of sin is death                                                                         Romans 6:23
Therefore; how can man stand before God, how can he be justified?
We are justified by his grace as a gift, through the redemption that is in Christ Jesus, whom God put forward as a propitiation by his blood, to be received by faith. This was to show God’s righteousness, because in his divine forbearance he had passed over former sins​.                                                                                              Romans 3:25&26
​That is, in Christ God was reconciling the world to himself, not counting their trespasses against them                                                                                           2 Corinthians 5:19
​For our sake he made him to be sin who knew no sin, so that in him we might become the righteousness of God.                                                                      2 Corinthians 5:21
​We implore you on behalf of Christ, be reconciled to God.                    2 Corinthians 5:20
​Therefore, if anyone is in Christ, he is a new creation. The old has passed away; behold, the new has come.                                                                                 2 Corinthians 5:17