My first date took 4hours then the second 5hours.. What does it mean?

You have a very strong connection with this person. I'm not going to say something cliche like "Oh darling, you've found the ONE" because that would be ridiculous. You obviously get along extremely well and clearly like each other a lot. Dates, like anything else, vary with every person. People have experienced dates just like yours. Keep at it and see where it goes. It sounds great so far, so relax and have fun with it!

You are into a long term relationship