I am an astrophysicist, by nature I need proof and solid evidence for me to understand and believe the phenomenon about nature and my surroundings.
It's very likely that in everyday living, you need neither proof nor solid evidence for understanding and belief.
While you're driving around town, odds are you don't whip out a scientific instrument to verify that a red traffic light is really red and that you should stop. You probably don't question every person who pays you a compliment for proof of their statement either. I also don't imagine that you demand your waiter at the restaurant conduct an analysis of your food to prove that it is indeed organic or high in fiber.
In short, life would be unlivable if one demanded these things on a day to day basis, which is why none of us do it in practice. So then the question is: what about this topic makes you demand this level of scrutiny?
With that being said, I have tried really hard to believe in God but I just can't.
Perhaps you should try a different god, or gods? The one-god isn't the only god-concept out there. Also, being religious or having a religion doesn't require theism at all. There are non-theistic religions.
There is no proof what so ever that he exists. I know their are bibles but how can you prove these books are not work of fiction?
What is your standard of proof? There are many, many proofs for the one-god of the Bible, along with many lines of evidence. If you're restricting your criteria of proof to "scientific evidence" of course you're not going to find it for the one-god. That god-concept is not scientific in any fashion, so why would one ask for something that one will never find?
Say the Bible is a work of fiction. Then what? How does something being fiction diminish its value? Do you not enjoy a good story? Do you not have an appreciation for the arts? Do these things not move you and have a reality to you in spite of not being "literally real?"
I tried hard to find some proof in God but just can't. Is there anybody out there that can show me some hard evidence that God does in fact exist?
Nope. As I said, that god-concept is not scientific, and I suspect you're constraining your proofs to empirical naturalism. Besides, I don't accept that god-concept myself, so I do not make a good advocate for it. But keep in mind what I said earlier about that humans do not, in practice, demand that level of proof for the vast majority of things in their lives. Why do you demand it here? Can you see a purpose to embracing something ideological that lacks your standard of proof? If not, then honestly, I would suggest you not bother. Theism isn't for everybody.